Information recording medium, information recording device and method, information reproduction device and method, information recording/reproduction device and method, computer program for controlling recording or reproduction, and data structure including control signal

ABSTRACT

An information record medium contains a plurality of content informations and a plurality of play list sets each including a plurality of play list informations defining the reproduction sequence of the content informations. In addition, the information recording medium contains title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations.

TECHNICAL FIELD

The present invention relates to: an information record medium, such as a high density optical disc, capable of recording thereon various information such as main picture information or video information, audio information, sub-picture information, reproduction control information, and so on, at high density; an apparatus for and a method of recording the information onto the information record medium; an apparatus for and a method of reproducing the information from the information record medium; an apparatus and a method capable of both recording and reproducing the information; a computer program for controlling the recording or reproduction; and a data structure including a control signal.

BACKGROUND ART

DVDs become common as optical discs onto which various information such as main picture information, audio information, sub-picture information, reproduction control information and so on is recorded. According to a DVD standard, the main picture information (video data), the audio information (audio data) and the sub-picture information (sub-picture data) are packetized each with the reproduction control information (navigation data) and are multi-recorded onto a disc in a program stream format of MPEG 2(Moving Picture Experts Group phase 2), which is a high performance encoding technology. Among them, the main picture information has data, which is compressed in a MPEG video format (ISO 13818-2), for one stream in one program stream. On the other hand, the audio information is recorded in a plurality of formats (i.e. linear PCM, AC-3, MPEG audio and so on) and has data for up to 8 streams in one program stream. The sub-picture information is defined by a bitmap, and is compressed and recorded in a run length method, and has data for up to 32 streams in one program stream.

On the other hand, a transport stream format of MPEG2 standard is coming to be standardized, which is suitable for data transfer. According to the transport stream format, a plurality of elementary streams are transferred at the same time. For example, a plurality of programs, such as a plurality of satellite digital broadcasting channels in one satellite radio wave, are transmitted at the same time in a TDM (Time Division Multiplex) scheme.

In an application for recording a DVD of this type, a DVD recorder is on the market. This recorder is adapted to record one play list as control information or logic information to control the reproduction, so that a record unit from a start of recording to an end of recording is reproduced as one title (e.g. one movie, one program and so on), while an inputted record signal is converted into a video recording format and is then recorded.

Additionally, in an application of DVD-ROM of this type, pre-recorded ROM, such as a movie, an animation film, a game and so on is on the market. Among them, a plurality of blocks, such as a parental block, an angle block and so on are streamed and recorded a DVD-ROM in which these blocks can be selected or switched is also on the market. Here “parental block” means a block comprising a video part corresponding to an adult version or a video part corresponding to a child version in the same title such as one movie. Furthermore, “angle block” means a block comprising video parts shot from various viewpoints in the same title such as one movie.

On the other hand, as a record apparatus using a tape record medium, there is a digital VCR in a D-VHS (Digital VHS) format. The digital VCR is adapted to record a stream signal outputted from a set top box (STB) as it is onto a tape medium and reproduce it. That is, it is adapted to record a plurality of programs received simultaneously in a certain time zone, with a one title, so-called “programs in a certain time zone”, and reproduce them collectively similarly to the receiving (that is, reproduce channel-switchably).

DISCLOSURE OF INVENTION

In the aforementioned digital VCR, however, the stream signal reproduced after recorded needs to be subjected to a signal processing by the STB. Furthermore, even if the reproduction output obtained from this is used, it is almost impossible to achieve the performance equals to or more than the situation that a plurality or programs are received and outputted in real time.

On the other hand, the conventional DVD as mentioned above does not suitable for multi-recording the main picture made of a plurality of streams, because it can only multi-record the main picture made of one stream with the audio information or the sub-picture information made of a plurality of streams. That is, the DVD complying with a MPEG2 program stream format to record the information cannot basically multi-record a plurality of programs transferred at the same time in the aforementioned MPEG2 transport stream format.

Even if there is a disc compatible with a high density recording or a large volume recording and having a high transfer rate, which allows to record simultaneously a plurality of programs transferred in a transport stream, one stream signal may often include a plurality of programs whose time scales are not aligned, when the stream signal is recorded as it is onto the optical disc as in the case of the aforementioned digital VCR. For this, as in the case of the aforementioned DVD recorder, it is technically difficult to select a desired program which may be started at an arbitrary time point, by recording only one play list in order to reproduce from the record start to the record end as a logically united one title such as “programs in a certain time zone”.

Thus, in the conventional DVD recorder application, when the plurality of programs included in one stream signal in a digital broadcasting or the like are to be recorded simultaneously and reproduced, there is a technical problem of the difficulty in reproducing the desired program, for example reproducing the desired programs which may be started at an arbitrary time point after selecting them from entire programs on a menu screen.

Additionally, in the DVD-ROM application, for example, when a plurality of content informations which are substantially common as for the content itself but different in the video resolution, the parental level or the angle are recorded, only the play list corresponding to each content information is recorded. Therefore, on the reproduction, the player presents the user individual play lists as different titles and may cause a confusion to the user in selecting the contents.

The present invention has been accomplished in view of the above problems for example. It is therefore an object of the present invention to provide an information record medium, an information record apparatus and method, an information reproduction apparatus and method, an information record reproduction apparatus and method, a computer program for a record or reproduction control, and a data structure including a control signal, which make it possible to efficiently record a large volume of content informations including a plurality of programs, the video resolution, the parental level, the angle and so on, as one title, and further to select and reproduce the desired program or the like from among them relatively easily.

The information record medium according to the present invention stores therein: a plurality of content informations; a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations.

According to the information record medium of the invention, a plurality of content informations may be stored as object data in an object data file. Here, the “content information” may be made of main picture information (video data), audio information (audio data), sub-picture information (sub-picture data) and the like. Various content informations as such may be multiplexed in a transport stream such as the MPEG2 as mentioned above. Alternatively, it may be multiplexed in a program stream of the MPEG2, or may not be multiplexed.

A plurality of play list sets may be stored in a play list information file, in a table form for each play list set. Each of A plurality of play list informations composing the play list set is an information unit logically accessible by the information reproduction apparatus. The play list information may include pointer information indicating a logically accessible item for example. Alternatively, it may include pointer information indicating a collection or assembly of items. Particularly, a plurality of play list informations defines a reproduction sequence for a plurality of content informations. For example, each play list information defines a reproduction sequence for one content information corresponding to each play list information, from among a plurality of content informations.

The title information may be stored as a table format for each title in the disc information file. Typically, there is a plurality of the title informations for one information record medium. For example, a plurality of title informations may be stored in the disc information file. The title information acts as a part of the reproduction control information to control the reproduction of the content information. The title information designates, so as to reproduce the plurality of content informations as the title which is the logically united information unit such as one movie or one TV program, one or more play list sets corresponding to the content informations.

At the recording of the information record medium, for example in the DVD recorder application, a plurality of programs streamed into the same transfer wave or the same transfer signal are recorded as one or more streams such as transport streams, as in the case of the aforementioned D-VHS. Alternatively, for example in the DVD-ROM application, a plurality of streams, which are substantially same as for the content itself but different as for the video resolution, the parental level, the angle and so on, are streamed and recorded.

When recording such a plurality of content informations, a plurality of play list sets each including a plurality of play list informations related to those content informations are recorded, while from the record start to the record end is recorded logically as one title. Furthermore, from among the plurality of play list sets, the title information to designate the play list set corresponding to the content informations to be reproduced is recorded for each of the plurality of content informations such as individual program, video resolution, parental level, angle and so on.

Therefore, at the reproduction of the information record medium, if the content informations are reproduced in accordance with the reproduction sequence defined by any of the plurality of play list informations included in each play list set designated by the title information, any of the plurality of content informations recorded as one title is reproduced for example in the DVD recorder application or the DVD-ROM application. Therefore, in the information reproduction apparatus such as the DVD player, if the control is performed to select the play list information corresponding to the desired content informations, such as a desired program, a desired video resolution, a desired parental level, a desired angle, a desired content information and so on, from among the plurality of play list informations included in each play list set, the desired content informations can be reproduced as a title.

As the result, according to the present invention, it is possible to efficiently record, as one title, the relevant play list from among the play lists relating to a large volume of content informations including a plurality of programs, or a plurality of video resolutions, parental levels, or angles. Furthermore, it is possible to select and reproduce the desired programs or the like from among them relatively easily.

In an aspect of the information record medium of the invention, the title information includes at least one title element, and the title element includes a first pointer information to designate at least one play list set corresponding to the content informations to be reproduced.

According to this aspect, at the reproduction of the information record medium, it is possible to identify the play list set corresponding to the content information to be reproduced, in accordance with the pointer information included in the title information. Then, if the control is performed to select the play lists corresponding to the desired program from among the plurality of play list informations included in this identified play list set, the desired content information can be reproduced as a title element. Furthermore, it is possible to reproduce one title by reproducing such one or more title elements solely or successively.

In this aspect relating to the title element, the title element may include, in addition to the first pointer information, at least one of (i) a first pre-command information to indicate a command to be executed before a reproduction of the content informations whose reproduction sequence is defined by one play list set designated by the first pointer information, (ii) a first post command information to indicate a command to be executed after a reproduction of the content informations whose reproduction sequence is defined by said one play list set and (iii) a first next information to designate a title element to be reproduced after the presently reproduced title element.

In this arrangement, at the reproduction of the information record medium, it is possible to execute the command to be executed before the reproduction of the content information whose reproduction sequence is defined by one play list set designated by the first pointer information, in accordance with the first pre-command information. Furthermore, it is possible to execute the command to be executed after the reproduction of the content information whose reproduction sequence is defined by one play list set designated by the first pointer information, in accordance with the first post command information. Additionally, it is possible to reproduce the next title element after the presently reproduced title element, in accordance with the first next information.

The first post command information or the second post command information mentioned later is a command to designate a dynamic motion, such as a command to branch the content information, a command to chose the next title or the like.

On the other hand, the first next information or the second next information mentioned later records only the next title element number for example, and the action based on these next informations depends on the DVD player system. That is, it is not information in a form of command for simplicity. For example, it is information to indicate a static motion, such as a shift uniformly to the next specific title element or the next specific play list element.

Thus, furthermore in the case that the title element includes the first pre-command information or the like, in addition to the first pointer information, one play list information defining the reproduction sequence of the content information to be reproduced may be selected by the first pre-command information, from among the plurality of play list informations included in a same play list.

In this arrangement, at the reproduction of the information record medium, such a control becomes possible to select the play list information corresponding to the desired content information, such as a desired program, a desired parental block or a desired angle block, from among a plurality of play list informations included in each play list set, in accordance with the first pre-command information. Here, the first pre-command information may include the selection condition information indicating a selection condition about each of the plurality of play list informations. When reproducing, one play list information is selected on the basis of a command corresponding to the selection condition.

As the result, for example, both in the DVD recorder application and in the DVD-ROM application, a large volume of content informations including a plurality of programs or blocks can be efficiently recorded as one title, and a desired program or block can be selected and reproduced from among these programs or blocks.

In the above described aspect relating to the title element, attribute information indicating an inherent attribute may be added to each of the plurality of play list informations included in a same play list set, and the title element may further include a selectable flag indicating that one of the plurality of play list informations included in the same play list is selectable depending on the attribute information.

In this arrangement, at the reproduction of the information record medium, the information reproduction apparatus can perform the selection operation as appropriate, in accordance with the selectable flag. Furthermore, in response to the attribute information added to the play list information, such a control becomes possible to select the play list information corresponding to the desired content information, such as a desired program, a desired parental block or a desired angle block, from among the plurality of play list informations included in each play list set. For example, if the selectable flag indicates that it is selectable, the information reproduction apparatus can compare the system parameter such as the video resolution or the like with the attribute inherent to the play list information indicated by the attribute information, and select the play list information optimum for the information reproduction apparatus in one play list set. On the other hand, if the selectable flag does not indicate that it is selectable, the information reproduction apparatus reproduces on that basis of the play list information to be selected uniquely.

As the result, for example, both in the DVD recorder application and in the DVD-ROM application, a large volume of content information including a plurality of programs or blocks can be efficiently recorded as one title. A desired program or block can be selected and reproduced from among these programs or blocks.

In the above described aspect relating to the title element, the title element may further include selection condition information indicating a selection condition about each of the plurality of play list informations included in a same play list set.

In this arrangement, at the reproduction of the information record medium, such a control becomes possible to select the play list information corresponding to the desired content information, such as a desired program, a desired parental block or a desired angle block, from among the plurality of play list informations included in each play list set, in accordance with the selection condition information about each play list information included in the title element.

As the result, for example, both in the DVD recorder application and in the DVD-ROM application, a large volume of content informations including a plurality of programs or blocks can be efficiently recorded as one title. A desired program or block can be selected and reproduced from among these programs or blocks.

In the above described aspect relating to the selection of the play list information in the same play list set, any one of the plurality of play list informations included in the same play list set may define the reproduction sequence of content information capable of composing a same title.

In this arrangement, in the DVD-ROM application capable of the parental reproduction or angle reproduction, at the reproduction of the information record medium, any one of the plurality of parental blocks, angle blocks or the like recorded as one title is reproducible. Thereby, the user can reproduce one title with a desired parental or angle. Alternatively, in the DVD recorder application, at the reproduction of the information record medium, any one program of content informations such as “programs in a certain time zone” recorded as one title for example is reproducible. Thereby, the user can select and reproduce the desired program in one title for example.

In another aspect of the information record medium of the invention, each play list information includes at least one play list element, the play list element includes a second pointer information to designate item information, which is logically accessible reproduction unit and composes the content information.

According to this aspect, at the reproduction of the information record medium, it is possible to identify the item information corresponding to the content information to be reproduced, in accordance with the second pointer information included in the play list element. Then, by reproducing this identified item information, the desired content information can be reproduced as the play list element. Furthermore, by reproducing one or more play list element solely or successively, one play list can be reproduced.

Incidentally, the “item information” is a minimum unit for display. For example, if the content information is still picture information, the item information is an information unit corresponding to one or more images.

In the above described aspect relating to this play list element, the play list element includes, in addition to the second pointer information, at least one of (i) a second pre-command information to indicate a command to be executed before a reproduction of one item information designated by the second pointer information, (ii) a second post command information to indicate a command to be executed after the reproduction of said one item information, and (iii) a second next information to designate a play list element to be reproduced after the presently reproduced play list element.

In this arrangement, at the reproduction of the information record medium, it is possible to execute a command to be executed before the reproduction of one item information designated by the second pointer information, in accordance with the second pre-command information. Furthermore, it is possible to execute a command to be executed after the reproduction of one item information designated by the second pointer information, in accordance with the second post command information. Additionally, it is possible to reproduce the play list element to be reproduced next the presently reproduced play list element.

In another aspect of the information record medium of the invention, each of the plurality of play list sets includes, in addition to the plurality of play list informations, an item definition table to define item information, the item information being a logically accessible reproduction unit and composing the content informations, and each of the plurality of play lists informations defines the reproduction sequence of the content informations by a unit of the item information.

According to this aspect, at the reproduction of the information record medium, the content informations are reproduced in the reproduction sequence defined by the unit of item information by the play list information. Particularly in this case, since the item information is defined collectively in the item definition table, the reference to the table can be achieved easily and quickly. Furthermore, the same item information can be advantageously used commonly among the plurality of play list informations in the same play list set.

In the above described aspect relating to the item information, the item information may comprise information, which defines a reproduction start address of the content information as in-point information and defines reproduction end address of the content information as out-point information.

In this arrangement, it is possible to start the reproduction of the corresponding content information part, in accordance with the in-point information of the item information. It is possible to end the reproduction of the corresponding content information part, in accordance with the out-point information of the item information. Thereby, the content information part corresponding to each item information can be reproduced easily. A series of such a reproduction makes it possible to reproduce a series of content informations.

In another aspect of the information record medium of the invention, a whole stream including a plurality of partial streams made of the plurality of content informations is multiplexed packet by packet which is a physically accessible unit and stores pieces of the plurality of content informations, relation definition information is further recorded to define a relationship between the plurality of multiplexed packets and the plurality of partial streams, as reproduction control information to control the reproduction of the plurality of content informations.

According to this aspect, the whole stream like at least a part of the transport stream of the MPEG2 includes a plurality of partial streams like the elementary stream. That is, one “partial stream” herein means one array of data or array of information, which is an elementary stream, such as a video stream, an audio stream, a sub-picture stream and so on composing a series of the content information. On the other hand, one “whole stream” herein means data arrangement or information arrangement made of bundles of a plurality of partial streams. Such a whole stream is multi-recorded onto the information record medium, by unit of packet (e.g. TS packet as mentioned later) which is a unit physically accessible by the information reproduction apparatus. The content information is made of a plurality of packets, which is a unit logically accessible by the information reproduction apparatus and each of which stores pieces of the content information. Furthermore, an ES map table (ES_Map Table) to indicate a relationship definition information (e.g. elementary stream packet ID as mentioned later (ES_PID)) are further recorded as the reproduction control information to control the reproduction of the content information.

Therefore, in the information reproduction apparatus, it is possible to reproduce a desired program, blocks and the like made of one or combination of the content information made of a part of the whole stream multi-recorded onto the information record medium, on the basis of the relationship between a plurality of packets multiplexed at the same time and a plurality of partial streams, which may be recorded in the relationship definition information.

Incidentally, as for the information record medium mentioned above, the object data file in which a plurality of content informations are stored, the play list information file in which a plurality of play list sets are stored and the disc information file in which a plurality of title informations are stored may be recorded in an area on the information record medium, differently from each other. From among them, the object data file may be multi-recorded in the transport stream format or the program stream format of the MPEG2. From among them, the play list information file or the disc information file may not be multi-recorded, in view of an easy and speedy reproduction control.

The information record apparatus according to the present invention includes: a first record device for recording a plurality of content informations; a second record device for recording a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and a third record device for recording title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations.

According to the information record apparatus of the invention, the first record device such as a controller, an encoder, a TS object generator mentioned later, an optical pickup, a cutting device or the like, records a plurality of content informations onto the information record medium such as a DVD. The second record device such as a controller, an encoder, an optical pickup, a cutting device or the like, records a plurality of play list sets including a plurality of content informations onto the information record medium such as a DVD. The third record device such as a controller, an encoder, an optical pickup, a cutting device or the like, records the title information designating at least one play list set from among the plurality of play list sets.

Therefore, the information record medium of the invention mentioned above (including various aspects thereof) can be recorded relatively efficiently.

Incidentally, the information record apparatus according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention as mentioned above.

The information record method according to the present invention includes: a first record process of recording a plurality of content informations; a second record process of recording a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and a third record process of recording title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations.

According to the information record method of the invention, the first record process is for recording a plurality of content informations, the second record process is for recording a plurality of play list sets, and the third record process is for recording the title information, onto the information record medium such as a DVD, with the aid of a controller, an encoder, a TS object generator mentioned below, an optical pickup, a cutting device or the like.

Therefore, the information record medium according to the present invention as mentioned above (including various aspects thereof) can be recorded relatively efficiently.

Incidentally, the information record method according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention.

The first information reproduction apparatus according to the present invention is for reproducing the information record medium according to the present invention mentioned above (including various aspects thereof), the apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set.

According to the first information reproduction apparatus of the invention, the reproduction device such as a controller, a decoder, a demultiplexer, an optical pickup and the like can reproduce the content information, the play list set and the title information. Then, the control device such as a controller and the like selects at least one designated by the reproduced title information, from among the plurality of reproduced play list sets. Furthermore, the control device controls the reproduction device to reproduce the plurality of content informations in the reproduction sequence defined by one play list information defining the reproduction sequence of the content informations to be reproduced, from among the plurality of play list informations included in the selected play list set.

Therefore, the information record medium according to the present invention as mentioned above (including various aspects thereof) can be reproduced relatively efficiently.

Incidentally, the first information reproduction apparatus according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention.

The second information reproduction apparatus according to the present invention is for reproducing the above described aspect of the information record medium related to the first pre-command information of the present invention, the apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, wherein the control device selects said one play list information from among the plurality of play list informations included in the selected play list set, on the basis of the first pre-command information.

According to the second information reproduction apparatus of the invention, the reproduction device such as a controller, a decoder, a demultiplexer, an optical pickup and the like can reproduce the content information, the play list set and the title information. Then, the control device such as a controller and the like selects at least one play list set designated by the reproduced title information, from among the plurality of reproduced play list sets. Particularly in this case, the control device selects one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, on the basis of the first pre-command information. Furthermore, the control device controls the reproduction device to reproduce the plurality of content informations in the reproduction sequence defined by this selected play list information.

Therefore, the above described aspect related to the first pre-command information of the information record medium of the present invention can be recorded relatively efficiently.

Incidentally, the second information reproduction apparatus according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention.

The third information reproduction apparatus according to the present invention is for reproducing the above described aspect of the information record medium related to the selectable flag of the present invention, the apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, wherein the control device selects said one play list information from among the plurality of play list informations included in the selected play list set, on the basis of the attribute information, if it is indicated by the selectable flag that the play list information is selectable.

According to the third information reproduction apparatus of the invention, the reproduction device such as a controller, a decoder, a demultiplexer, an optical pickup and the like can reproduce the content information, the play list set and the title information. Then, the control device such as a controller and the like selects at least one play list set designated by the reproduced title information, from among the plurality of reproduced play list sets. Particularly in this case, the control device selects one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, on the basis of the attribute information, if it is indicated by the selectable flag that the play list information is selectable. Furthermore, the control device controls the reproduction device to reproduce the plurality of content informations in the reproduction sequence defined by this selected play list information.

Therefore, the above described aspect related to the selectable flag of the information record medium of the present invention can be recorded relatively efficiently.

Incidentally, the third information reproduction apparatus according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention.

The fourth information reproduction apparatus according to the present invention is for reproducing the above described aspect of the information record medium related to the selection condition information of the present invention, the apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, wherein the control device selects said one play list information from among the plurality of play list informations included in the selected play list set, on the basis of the selection condition information.

According to the fourth information reproduction apparatus of the invention, the reproduction device such as a controller, a decoder, a demultiplexer, an optical pickup and the like can reproduce the content information, the play list set and the title information. Then, the control device such as a controller and the like selects at least one play list set designated by the reproduced title information, from among the plurality of reproduced play list sets. Particularly in this case, the control device selects one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, on the basis of the selection condition information. Furthermore, the control device controls the reproduction device to reproduce the plurality of content informations in the reproduction sequence defined by this selected play list information.

Therefore, the above described aspect related to the selection condition information of the information record medium of the present invention can be recorded relatively efficiently.

Incidentally, the fourth information reproduction apparatus according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention.

The information reproduction method according to the present invention is for reproducing the information record medium according to the present invention (including various aspects thereof), the method implemented with an information reproduction apparatus comprising a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information, the method comprising: a first control process of selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and a second control process of controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set.

According to the information reproduction method of the invention, the first control process is for selecting at least one play list set designated by the reproduced title information, from among the plurality of reproduced play list sets, with the aid of the controller, the decoder, the demultiplexer, the optical pickup and so on. Furthermore, a second control process is for controlling the reproduction device to reproduce the plurality of content informations in the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set.

Therefore, the information record medium of the invention mentioned above (including various aspects thereof) can be reproduced relatively efficiently.

Incidentally, the information reproduction method according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention as mentioned above.

The information record reproduction apparatus according to the present invention includes: a first record device for recording a plurality of content informations; a second record device for recording a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; a third record device for recording title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations; a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set.

According to the information record reproduction apparatus of the invention, since it has both of the above described information record apparatus of the present invention and the above described first information reproduction apparatus of the present invention, the information record medium of the invention (including various aspects thereof) can be recorded and reproduced relatively efficiently.

Incidentally, the information record reproduction apparatus according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention.

The information record reproduction method according to the present invention is implemented with an information record reproduction apparatus comprising a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information, the method comprising: a first record process of recording a plurality of content informations; a second record process of recording a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; a third record process of recording title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations; a first control process of selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and a second control process of controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set.

According to the information record reproduction method of the invention, since it has both of the above described information record method of the present invention and the above described first information reproduction method of the present invention, the information record medium of the invention (including various aspects thereof) can be recorded and reproduced relatively efficiently.

Incidentally, the information record reproduction method according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention.

The computer program for a record control according to the present invention is to control a computer disposed at the information record apparatus according to the present invention (including various aspects thereof), the program making the computer function as at least a part of the first record device, the second record device and the third record device.

According to the computer program for a record control of the invention, the information record apparatus according to the present invention mentioned above may be realized relatively easily, by reading and running the computer program from a record medium, such as a ROM, a CD-ROM, a DVD-ROM, a hard disk and so on, storing the computer program therein/thereon, or by downloading the computer program to the computer via the communication device and running it.

Incidentally, the computer program for a record control according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention as mentioned above.

The computer program for a reproduction control according to the present invention is to control a computer disposed at the information reproduction apparatus according to the present invention as mentioned above (including various aspects thereof), the program making the computer function as at least a part of the reproduction device and the control device.

According to the computer program for a reproduction control of the invention, the information reproduction apparatus according to the present invention mentioned above may be realized relatively easily, by reading and running the computer program from a record medium, such as a ROM, a CD-ROM, a DVD-ROM, a hard disk and so on, storing the computer program therein/thereon, or by downloading the computer program to the computer via the communication device and running it.

Incidentally, the computer program for a reproduction control according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention as mentioned above.

The computer program for a record reproduction control according to the present invention is to control a computer disposed at the information record reproduction apparatus according to the present invention as mentioned above (including various aspects thereof), the program making the computer function as at least a part of the first record device, the second record device, the third record device, the reproduction device and the control device.

According to the computer program for a record reproduction control of the invention, the information record reproduction apparatus according to the present invention mentioned above may be embodied relatively easily, by reading and running the computer program from a record medium, such as a ROM, a CD-ROM, a DVD-ROM, a hard disk and so on, storing the computer program therein/thereon, or by downloading the computer program to the computer via the communication device and running it.

Incidentally, the computer program for a record reproduction control according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention as mentioned above.

The data structure including a control signal according to the present invention includes: a plurality of content informations; a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations.

According to the data structure including the control signal of the invention, similarly to the case of the information record medium according to the present invention as mentioned above, it is possible to record a large volume of content informations including a plurality of programs or a plurality of parental blocks or angle blocks and so on, efficiently as one title. Furthermore, it is relatively easy to select and reproduce the desired program or blocks from these programs or blocks.

Incidentally, the data structure including the control signal according to the present invention may also take various aspects, corresponding to various aspects of the information record medium according to the present invention as mentioned above.

The above object of the present invention is achieved by a computer program product for a record control in a computer-readable medium for tangibly embodying a program of instructions executable by a computer disposed at the aforementioned information record apparatus according to the present invention (including various aspects), the program making the computer function as at least a part of the first record device, the second record device and the third record device.

The above object of the present invention is achieved by a computer program product for a reproduction control in a computer-readable medium for tangibly embodying a program of instructions executable by a computer disposed at the information reproduction apparatus according to the present invention (including various aspects), the program making the computer function as at least a part of the reproduction device and the control device.

The above object of the present invention is achieved by a computer program product for a record reproduction control in a computer-readable medium for tangibly embodying a program of instructions executable by a computer disposed at the information record reproduction apparatus according to the present invention (including various aspects), the program making the computer function as at least a part of the first record device, the second record device, the third record device, the reproduction device and the control device.

According to the computer program product for the record control, the reproduction control, or the record reproduction control of the invention, at least a part of the first record device, the second record device, the reproduction device and the control device according to the present invention mentioned above may be embodied relatively easily, by reading and running the computer program product from a record medium, such as a ROM, a CD-ROM, a DVD-ROM, a hard disk and so on, storing the computer program therein/thereon, or by downloading the computer program product to the computer via the communication device and running it. More specifically, the computer program product may be made of computer readable codes (or computer readable commands) to make the computer function as at least a part of the first record device, the second record device, the third record device, the reproduction device and the control device.

These effects and other advantages of the present invention become more apparent from the following embodiments and examples.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 illustrates, in its upper part, a general plan view of an optical disc as an embodiment of the information record medium of the present invention; and illustrates, in its lower part, a schematic conceptual diagram of an area structure in a radius direction corresponding to the general plan view in the upper part.

FIG. 2 illustrates a schematic conceptual diagram (FIG. 2(a)) of a conventional program stream of MPEG2; a schematic conceptual diagram (FIG. 2(b)) of a transport stream of MPEG2 used in the embodiment; and a schematic conceptual diagram (FIG. 2(c)) of a program stream of MPEG2 used in the embodiment.

FIG. 3 is a diagram schematically illustrating a data structure recorded on the optical disc in the embodiment.

FIG. 4 is a conceptual diagram hierarchically illustrating a detail of a data structure in each title shown in FIG. 3.

FIG. 5 is a conceptual diagram hierarchically illustrating a detail of a data structure in each play list set shown in FIG. 3

FIG. 6 is a conceptual diagram schematically illustrating a detail of a data structure in each play list set shown in FIG. 3.

FIG. 7 is a conceptual diagram schematically illustrating a detail of a data structure of each item shown in FIG. 6.

FIG. 8 is a conceptual diagram schematically illustrating a logic structure of data in each title element shown in FIG. 4.

FIG. 9 is a conceptual view schematically illustrating a logic structure of data in each title element shown in FIG. 4, in a case that each play list set is composed of one play list.

FIG. 10 is a conceptual view schematically illustrating a detail of a data structure in each object shown in FIG. 3.

FIG. 11 is a view schematically illustrating a situation that an elementary stream for a program #1, shown in the upper column, and an elementary stream for a program #2, shown in the middle column, are multiplexed to form a transport stream for these two programs, on the basis of a time scale in a horizontal direction.

FIG. 12 is a conceptual view conceptually illustrating an image of TS packets multiplexed in one transport stream in the embodiment, as a packet arrangement based on the time scale.

FIG. 13 is a view schematically illustrating a logic structure of data on an optical disc in the embodiment, focusing on development from a logic hierarchy to an object hierarchy or an entity hierarchy.

FIG. 14 is a block diagram schematically illustrating an information record reproduction apparatus in the embodiment.

FIG. 15 is a flow chart indicating a recording operation (part 1) of the information record reproduction apparatus in the embodiment.

FIG. 16 is a flow chart indicating a recording operation (part 2) of the information record reproduction apparatus in the embodiment.

FIG. 17 is a flow chart indicating a recording operation (part 3) of the information record reproduction apparatus in the embodiment.

FIG. 18 is a flow chart indicating a recording operation (part 4) of the information record reproduction apparatus in the embodiment.

FIG. 19 is a flow chart indicating a reproduction operation of the information record reproduction apparatus in the embodiment.

FIG. 20 is a conceptual diagram schematically illustrating a data logical structure in an example of the title element 200-2 used in the first selection scheme of the embodiment.

FIG. 21 is a flow chart indicating a reproduction operation in one play list in the first selection scheme of the embodiment.

FIG. 22 is a flow chart indicating a selection operation to select one play list in the first selection scheme of the embodiment.

FIG. 23 is a conceptual diagram schematically illustrating a data logical structure in another example of the title element 200-2 used in the second selection scheme of the embodiment.

FIG. 24 is a flow chart indicating a reproduction operation in one play list in the second selection scheme of the embodiment.

FIG. 25 is a chart indicating a selection operation to select one play list in the second selection scheme of the embodiment.

FIG. 26 is a conceptual diagram schematically illustrating a data logical structure in another example of the title element 200-2 used in the third selection scheme of the embodiment.

FIG. 27 is a conceptual diagram schematically illustrating a detail of a data structure of the play list set control information of FIG. 26.

FIG. 28 is a flow chart indicating a reproduction operation by one play list in the third selection scheme of the embodiment.

FIG. 29 is a chart indicating a selection operation to select one play list in the third selection scheme of the embodiment.

FIG. 30 is a view conceptually illustrating a general flow of an access during a reproduction in the embodiment, showing in association with a logic structure of an optical disc.

FIG. 31 is a conceptual diagram schematically illustrating a hierarchical structure in a specific example of a title information set in the embodiment.

FIG. 32 is a conceptual diagram schematically illustrating a hierarchical structure in a specific example of a disc header in the embodiment.

FIG. 33 is a conceptual diagram schematically illustrating a hierarchical structure in a specific example of title information in the embodiment.

FIG. 34 is a conceptual diagram schematically illustrating a hierarchical structure in a specific example of a play list set in the embodiment.

FIG. 35 is a conceptual diagram schematically illustrating a hierarchical structure in a specific example of a play list in the embodiment.

FIG. 36 is a conceptual diagram schematically illustrating a hierarchical structure in a specific example of a play list element in the embodiment.

FIG. 37 is a conceptual diagram schematically illustrating a hierarchical structure in a specific example of an item definition table in the embodiment.

FIG. 38 is a diagram schematically showing a specific example of a data structure in an AU table constructed in the object information file and an ES map table associated with the AU table, in a specific example of the embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

(Information Record Medium)

The information record medium of the present invention is discussed, with reference to its embodiments, as well as FIG. 1 to FIG. 13. In these embodiments, the information record medium of the present invention is applied to an optical disc capable of recording (writing) and reproducing (reading).

Firstly, with reference to FIG. 1, a fundamental structure of the optical disc in an embodiment is discussed. FIG. 1 illustrates, in its upper part, a general plan view of the optical disc structure having a plurality of areas, and illustrates conceptually, in its lower part, an area structure in the radius direction corresponding to the upper part.

As shown in FIG. 1, the optical disc 100 may be recorded by various record methods, such as a magneto-optical method, a phase change method, capable of recording (writing) only once or a plurality of times. Similarly to DVDs, the optical disc 100 has a lead-in area 104, a data area 106 and a lead-out area 108, from the inner circumference around a center hole 102 to the outer circumference, on the record surface of the disc body measuring about 12 cm in diameter. In each area, groove tracks and land tracks may be alternately arranged, concentrically or spirally around the center hole 102. The groove tracks may be wobbled. Furthermore, pre-pits may be formed on one or both of these tracks. Incidentally, the present invention is not exclusively limited to the optical disc having three areas mentioned above.

Next, with reference to FIG. 2, the structures of the transport stream (TS) and the program stream (PS) to be recorded onto the optical disc in the embodiment are discussed. FIG. 2(a) schematically illustrates a MPEG2 program stream of a conventional DVD for a comparison, FIG. 2(b) schematically illustrates a MPEG2 transport stream (TS) structure. Furthermore, FIG. 2(c) schematically illustrates a MPEG2 program stream structure in the present invention.

In FIG. 2(a), one program stream to be recorded in the conventional DVD includes only one video stream for video data as main picture information, along the time axis t, and further includes up to 8 audio streams of audio data as audio information, up to 32 sub-picture streams for sub-picture data as sub-picture information. That is, the video data to be multiplexed at an arbitrary time point tx relates to only one video stream. For example, a plurality of video stream corresponding to a plurality of TV programs or a plurality of movies can not be included at the same time in the program stream. It is not possible to multiplex a plurality of TV programs and transfer or record them, in a program stream format of a DVD having only one video stream, because at least one video stream is required for each TV program, in order to transfer or record the multiplexed TV program or the like involving a video image.

In FIG. 2(b), one transport stream (TS) to be recorded in the optical disc 100 of the present invention includes a plurality of video streams as elementary streams (ES) for video data as main picture information, and further includes a plurality of audio streams as elementary streams (ES) for audio data as audio information and a plurality of sub-picture streams as elementary streams (ES) for sub-picture as sub-picture information. That is, the video data to be multiplexed at an arbitrary time point tx relates to a plurality of video streams. For example, a plurality of video streams that may correspond to a plurality of TV programs or a plurality of movies can be included at the same time in the transport stream. Thus, it is possible to multiplex a plurality of TV programs and transfer or record them, in the transport stream format having a plurality of video streams. However, the sub-picture stream is not transferred in a digital broadcasting employing the existing transport stream.

In FIG. 2(c), one program stream (PS) to be recorded onto the optical disc 100 of the present invention includes a plurality of video streams for video data as main picture information, and further includes a plurality of audio streams for audio data as audio information and a plurality of sub-picture streams for sub-picture data as sub-picture information. That is, the video data to be multiplexed at an arbitrary time point tx relates to a plurality of video streams. For example, a plurality of video streams that may correspond to a plurality of TV programs or a plurality of movies can be included at the same time in the program stream.

Incidentally, for convenience of explanation, the video stream, the audio stream and the sub-picture stream are arranged in this order from the top in FIG. 2(a) to FIG. 2(c). Nevertheless, this order or sequence does not correspond to an order or sequence for multiplexing packet by packet as mentioned below. In the transport stream, conceptually, a set of one video stream, two audio streams and two sub-picture streams corresponds to one program for example.

The optical disc 100 in the aforementioned embodiment is adapted to multi-record the transport stream (TS) as shown in FIG. 2(b), i.e. to record a plurality of programs at the same time. Furthermore, instead of or in addition to this transport stream, the program stream (PS) as shown in FIG. 2(c) can be multi-recorded onto the same optical disc 100.

Next, with reference to FIG. 3 and FIG. 10, a structure of data to be recorded onto the optical disc 100 is discussed. FIG. 3 schematically illustrates the data structure to be recorded onto the optical disc 100. FIG. 4 schematically illustrates in detail the data structure in each object shown in FIG. 3. FIG. 5 and FIG. 6 schematically show a data structure in detail respectively in each play list (P list) set shown in FIG. 3. FIG. 7 schematically shows a detail of the data structure of each item shown in FIG. 6. FIG. 8 schematically shows a logic structure of data in each title element shown in FIG. 4. FIG. 9 schematically shows a logic structure of data in each title element, in a case that each play list set is composed of one play list. FIG. 10 schematically shows a detail of a data structure in each object shown in FIG. 3.

In the following explanation, the “title” means a reproduction unit, on the basis of which a plurality of “play lists” are executed continuously or sequentially, and which is a logically large grouped unit, such as one movie or one TV program. The “play list set” means a bundle of “play lists”. For example, it may be a bundle of play lists to reproduce a plurality of content information having a special relationship switchable to each other in an angle reproduction or a parental reproduction, or may be a bundle of play lists to reproduce content information relating to a plurality of programs broadcasted in the same time zone and collectively recorded. Alternatively, it may be a bundle of play lists to reproduce various content information, in one title, prepared on the basis of required function, for example on the basis of video performance or audio performance required for the information reproduction system, such as a high vision compatibility, a display resolution, a surround speaker compatibility, a speaker layout and so on. The “play list” is information for storing the information required to reproduce the “object” and consists of a plurality of “items” each storing the information about a reproduction range of the object to access the object. The “object” is the entity information of contents constructing the aforementioned MPEG2 transport stream.

In FIG. 3, the optical disc 100 is provided with four files as a logical structure: a disc information file 110; a play list (P list) information file 120; an object information file 130; and an object data file 140. The disc 100 is further provided with a file system 105 for managing these files. Incidentally, although FIG. 3 does not show directly the physical data arrangement on the optical disc 100, it is possible to perform the recording in such a manner that the arrangement shown in FIG. 3 corresponds to another arrangement shown in FIG. 1. That is, it is possible to record the file system 105 or the like in the data record area 106 following the lead-in area 104 and further record the object data file 140 or the like in the data record area 106. The file structure shown in FIG. 3 can be constructed, even without the lead-in area 104 or the lead-out area 108 shown in FIG. 1.

The disc information file 110 is a file for storing general information about the entire optical disc 100, and stores the disc general information 112, the title information table 114 and other information 118. The disc general information 112 may store the total numbers of titles or the like in the optical disc 100. The title information table 114 includes a title pointer 114-1 and a plurality of titles 200 (title #1-#m) whose ID (identification) number or record address is indicated by the title pointer. In each title 200, each title type (e.g. sequential reproduction type, branch type and so on), or the play list (P list) number constructing each title is recorded for each title, as the logical information.

More specifically, for example, as shown in FIG. 4, each title 200 is made of a title general information 200-1, a plurality of title elements 200-2 and other information 200-5. Furthermore, each title element 200-2 is made of a pre-command 200PR, a pointer 200PT to a play list set, a post command 200PS and other information 200-6.

The pointer 200PT as an example of the first pointer information according to the present invention indicates an ID number of the play list set 126S stored in the play list information file 120 corresponding to content information to be reproduced on the basis of the title element 200-2 including the pointer 200PT. Incidentally, the pointer 200PT may be information to indicate a record position of the play list set 126S corresponding to the content information to be reproduced on the basis of the title element 200-2. The pre-command 200PR as an example of the first pre-command according to the present invention indicates a command to be executed before reproducing the content information whose reproduction sequence is defined by one play list set 126S designated by the pointer 200PT. The post command 200PS as an example of the first post command according to the present invention is a command to be executed after reproducing the content information whose reproduction sequence is defined by said one play list set. Other information 200-5 included in the title element 200-2 may include next information to designate a title element for a next reproduction after the present reproduction of the present title element, for example.

Therefore, when the information reproduction apparatus reproduces the information record medium, the desired content information can be reproduced as a title element 200-2, by making access to the play list set 126S in accordance with the pointer 200PT and performing a control to select play list corresponding to the desired program or the like from among a plurality of play lists 126 in the play list set 126S. Furthermore, reproducing such a title element 200-2 solely or sequentially makes it possible to reproduce one title 200. Furthermore, it is possible to execute commands to be executed before reproduction, in the content information whose reproduction sequence is defined by one play list set 126S designated by the pointer 200PT, according to the pre-command 200PR. Furthermore, it is possible to execute commands to be executed after the reproduction, in the content information whose reproduction sequence is defined by one play list set 126S designated by the pointer 200PT, according to the post command 200PS. The post command 200PS may be a command to branch the content information, a command to select a next title and so on. Additionally, it is possible to reproduce a next title element 200-2 to be reproduced after the presently reproduced title element 200-2, according to the “next information” included in other information 200-5.

Again in FIG. 3, the play list information file 120 stores the play list (P list) information table 121 indicating the logical structure of each play list. This table 121 is divided into the play list (P list) management information 122, the play list (P list) set pointer 124, a plurality of play list (P list) sets 126S (P list set #1-#n), and other information 128. In this play list information table 121, the logical information of each play list set 126S is stored in the order of the play list set number. In other words, the order for storing the each play list set 126S is the play list set numbers. Furthermore, in the aforementioned title information table 114, the same play list set 126S can be referred from a plurality of titles 200. That is, the play list set #p in the play list information table 121 may be pointed on the title information table 114, even in the case that title #q and title #r use the same play list set #p.

As shown in FIG. 5, the play list set 126S includes play list set general information 126-1, a plurality of play lists 126 (play list #1-#x), an item definition table 126-3, and other information 126-4. Each play list 126 includes a plurality of play list elements 126-2 (play list element #1-#y), and other information 126-5. Furthermore, each play list element 126-2 includes a pre-command 126PR, a pointer 126PT to item, a post command 126PS and other information 126-6.

The pointer 126PT as an example of the second pointer information according to the present invention indicates an item identification number defined by the item definition table 126-3 corresponding to the content information to be reproduced on the basis of the play list element 126-2 including the pointer 126PT. Incidentally, the pointer 126PT may be an item record position defined by the item definition table 126-3.

As shown in FIG. 6, in the play list set 126S, a plurality of items 204 are defined in the item definition table 126-3. They are commonly belonged to a plurality of play lists 126. Furthermore, as the play list set general information 126-1, a name of each play list 126 included in the play list set 126S, UI (user interface information) such as a reproduction time, address information to each item definition table 126-3 and so on are recorded.

Again in FIG. 5, the pre-command 126PR as an example of the second pre-command according to the present invention indicates a command to be executed before reproduction of one item 204 designated by the pointer 126PT. The post command 126PS as an example of the second post command according to the present invention indicates a command to be executed after the reproduction of said one item 204. Other information 126-6 included in the play list element 126-2 may include the next information to designate the play list element 126-2 relating to the next reproduction of the reproduction of the play list element 126-2.

As shown in FIG. 7, the item 204 is a minimum unit to be displayed. In the item 204, “in-point information” to indicate a start address of an object and “out-point information” to indicate an end address of the object are recorded. Incidentally, each of these “in-point information” and “out-point information” may indicate the address directly or indirectly as a time period or time point on the reproduction time scale. In the figure, if a plurality of ESs (Elementary Streams) are multiplexed for the object designated by “stream object #m”, designating the item 204 means designating a special ES or special combination of ESs.

As shown in FIG. 8, the title element 200-2 logically consists of the pre-command 200PR or 126PR, the play list set 126S selected by the pointer 200PT, the post command 200PT or 126PS, and the next information 200-6N. Therefore, a processing to select the play list 126 from among the play list set 126S is executed, according to any condition reproducible in a system, such as video resolution.

As shown in FIG. 9, however, if the play list set designated by the pointer 200PT consists of only one play list, i.e. if the play list set 126S shown in FIG. 3 is replaced by a single play list 126, the title element 200-2 logically consists of the pre-command 200PR or 126PR, the play list 126 to be reproduced during the reproduction operation, the post command 200PS or 126PS, and the next information 200-6N. In this case, once the play list set is designated for the reproduction, the single play list 126 is reproduced, regardless of the condition reproducible in the system.

Again in FIG. 3, in the object information file 130, the storage position (i.e. the logical address of the reproduction object) in the object data file 140 for each item constructed in each play list 126, and/or various attribute information relating to the reproduction of the item are stored. Particularly in this embodiment, the object information file 130 stores the AU table 131 including a plurality of AU (Associate Unit) information 132I (AU #1-#q) as mentioned below, the ES (Elementary Stream) map table 134 and other information 135.

The object data file 140 stores a plurality of TS objects 142 for each transport stream (TS #1 object-TS #s object), i.e. entity data of contents to be actually reproduced.

Incidentally, four kinds of file discussed with reference to FIG. 3 can be further divided into a plurality of files respectively to be stored. All these files may be managed by the file system 105. For example, the object data file 140 can be divided into a plurality of files such as object data file #1, object data file #2 and so on.

As shown in FIG. 10, the TS object 142 shown in FIG. 3, as a logically reproducible unit, may be divided into a plurality of aligned units 143 each having 6 kB of data amount. The head of the aligned units 143 is aligned with the head of the TS object 142. Each aligned unit 143 is further divided into a plurality of source packets 144 each having 192B of data amount. The source packet 144 is a physically reproducible unit, on the basis of which (i.e. packet by packet) at least the video data, the audio data and the sub-picture data from among the data on the optical disc 100 are multiplexed, and other information may be multiplexed in the same manner. Each source packet 144 includes the control information 145 having 4B of data amount to control the reproduction, such as the packet arrival time stamp or the like indicating the reproduction start time point of the TS (Transport Stream) packet on the reproduction time scale, and includes the TS packet 146 having 188B of data amount. The TS packet 146 (also referred to as “TS packet payload”) has a packet header 146 a at its head portion. The video data may be packetized as the “video packet”, the audio data may be packetized as the “audio packet”, or the sub-picture data may be packetized as the “sub-picture packet”, otherwise other data may be packetized.

Next, with reference to FIG. 11 and FIG. 12, an explanation is made on the multi-recording of the video data, the audio data, the sub-picture data and the like in the transport stream format as shown in FIG. 2(b), by the TS packet 146 shown in FIG. 4. FIG. 11 conceptually illustrates that the elementary stream (ES) for program #1 (PG1) in the upper stage and the elementary stream (ES) for program #2 (PG2) in the middle stage are multiplexed, and the transport stream (TS) for these two programs (PG1&2) is formed, under an assumption that a horizontal axis is defined as a time axis. FIG. 12 conceptually illustrates an image of the TS packets multiplexed in one transport stream (TS), as a packet array along the time (sic).

As shown in FIG. 11, the elementary stream for program #1 (in the upper stage) may be formed by discretely arranging TS packets 146 obtained by packetizing the video data for program #1, along the time axis. The elementary stream for program #2 (in the middle stage) may be formed by discretely arranging TS packets obtained by packetizing the video data for program #2, along the time axis. Then, these TS packets 146 are multiplexed so that the transport stream (in the lower stage) for two programs is made. Incidentally, omitted for convenience of explanation in FIG. 11, the elementary stream made of TS packets obtained by packetizing the audio data as the elementary stream for program #1, and/or the sub-picture stream made of TS packets obtained by packetizing the sub-picture data may be multiplexed similarly, as shown in FIG. 2(b). In addition to this, the elementary stream made of TS packets obtained by packetizing the audio data, as the elementary stream for program #2, and the sub-picture stream made of TS packets obtained by packetizing the sub-picture data may be multiplexed similarly.

As shown in FIG. 12, in this embodiment, a plurality of TS packets 146 multiplexed as such forms one TS stream. Then, a plurality of TS packets 146 in the multiplexed form is multi-recorded onto the optical disc 100, with the information such as the packet arrival time stamp 145 and the like being added. Incidentally, in FIG. 12, the TS packet 146 consisting of the data forming program #i (i=1, 2, 3) is indicated by “element (i0j)”, wherein, j=1, 2, . . . ) is a sequential number for each stream composing the program. This (i0j) is defined as a packet ID which is an identification number of the TS packet 146 for each elementary stream. This packet ID is fixed at an inherent value for a plurality of TS packets 146 to be multiplexed at the same time point, so that the plurality of TS packets 146 are distinguished from each other even if multiplexed at the same time point.

Furthermore, in FIG. 12, the PAT (Program Association Table) and the PMT (Program Map Table) are also packetized by the TS packet 146 unit and multiplexed. The PAT among them stores a table indicating a plurality of PMT packet IDs. Particularly, the PAT is defined by MPEG2 standard so that (000) is given as a predetermined packet ID, as shown in FIG. 12. That is, from among a plurality of packets multiplexed at the same time point, the TS packet 146 obtained by packetizing the PAT is detected, as the TS packet 146 whose packet ID is (000). The PMT stores a table indicating the packet ID for each elementary stream forming each program in one or more programs. Any packet ID can be given to the PMT, their packet IDs are indicated by the PAT detectable with the packet ID (000) as mentioned above. Therefore, among a plurality of packets multiplexed at the same time point, the TS packets 146 obtained by packetizing the PMT (i.e. TS packets 146 to which packet IDs (100), (200) and (300) are given in FIG. 12) are detected on the basis of the PAT.

In the case that the transport stream as shown in FIG. 12 is transferred digitally, the tuner refers to the PAT and the PMT constructed as such and thereby extracts the multiplexed packets corresponding to the desired elementary stream and decodes the extracted packets.

In this embodiment, these PAT and PMT are included as the TS packets 146 to be stored in the TS object 142 shown in FIG. 10. That is, when the transport stream as shown in FIG. 12 is transferred, the transferred stream can be directly recorded onto the optical disc 100, which is a great advantage.

Furthermore in this embodiment, these PAT and PMT recorded as such are not referred to when the optical disc 100 is reproduced. Instead, referring to the AU table 131 and the ES map table 134, shown in FIG. 3 and mentioned in detail later, makes it possible to perform the reproduction effectively and apply to the complicated multi-vision reproduction or the like. For this, in this embodiment, a relationship between packets and the elementary stream obtained by referring to the PAT and the PMT on decoding or recording for example is stored in the object information file 130, in a form of AU table 131 and ES map table 134, without packetizing or multiplexing.

Next, with reference to FIG. 13, the logical structure of data on the optical disc 100 is discussed. FIG. 13 schematically illustrates the logical structure of data on the optical disc 100, focusing on the development from the logic hierarchy to the object hierarchy or the entity hierarchy.

In FIG. 13, one or more titles 200 that are a logical large unit such as one movie or one TV program are recorded on the optical disc 100. Each title 200 includes one or more title elements 200-2. Each title element 200-2 logically consists of a plurality of play list sets 126S. In each title element 200-2, the plurality of play list sets 126S may have a sequential structure or may have a branch structure.

Incidentally, in the case of a simple logical structure, one title element 200-2 consists of one play list set 126S. Furthermore, one play list set 126S consists of one play list 126. On the other hand, it is possible to refer to one play list set 126S by a plurality of title elements 200-2 or a plurality of titles 200.

Each play list 126 is logically made of a plurality of items (play items) 204. In each play list 126, a plurality of items 204 may have the sequential structure or may have the branch structure. On the other hand, it is possible to refer to one item 204 by a plurality of play lists 126. The aforementioned in-point information and out-point information recorded on/in the item 204 logically designates the reproduction range of the TS object 142. Then, the object information 130 d of the logically designated reproduction range is referred to and thereby the reproduction range of the TS object 142 is physically designated, via the file system finally. Here, the object information 130 d includes various information to reproduce the TS object 142, such as the attribute information of the TS object 142, the ES address information 134 d and the like required for the data search in the TS object 142 (Incidentally, the ES map table 134 shown in FIG. 3 includes a plurality of ES address information 134 d).

Then, when the information record and reproduce apparatus reproduces the TS object 142 as mentioned below, a physical address to be reproduced in the TS object 142 is obtained from the item 204 and the object information 130 d so that a desired elementary stream is reproduced.

Incidentally, the EP (Entry Pass) map including a plurality of ES address information 134 d, shown within the object information of FIG. 13, herein indicates an object information table in which the AU table 131 and the ES map table 134 are listed.

Thus, in this embodiment, the in-point information and out-point information recorded on/in the item 204, as well as the ES address information 134 d recorded in the ES map table 134 (see FIG. 3) of the object information 130 d make it possible to perform the association from the logic hierarchy to the object hierarchy in the reproduction sequence so that the elementary stream is reproduced.

As discussed above, in this embodiment, units of the TS packet 146 are multiplexed and recorded on the optical disc 100. Thereby, the transport stream including a plurality of elementary streams as shown in FIG. 2(b) can be recorded onto the optical disc 100. In this embodiment, in the case that digital broadcasting is recorded onto the optical disc 100, a plurality of programs can be recorded at the same time, within the restriction of the record rate. Nevertheless, a record method is employed herein, in which a plurality of programs are multiplexed and recorded for one TS object 142. Now, an explanation is made on an embodiment of the information record reproduction apparatus capable of performing such a record processing.

(Information Record Reproduction Apparatus)

Next, with reference to FIG. 14 to FIG. 19, an embodiment of the information record reproduction apparatus of the present invention is discussed. Here, FIG. 14 is a block diagram of the information record reproduction apparatus, and FIGS. 15 to 19 illustrate the operational flow.

In FIG. 14, the information record reproduction apparatus 500 is roughly divided into a reproduction system and a record system. The apparatus 500 is constructed to record the information onto the optical disc 100 mentioned above and reproduce the information recorded thereon/therein. In this embodiment, the information record reproduction apparatus 500 is thus for recording and reproduction. Nevertheless, an embodiment of the information record apparatus according to the present invention can be constructed basically with the record system of the apparatus 500 and an embodiment of the information reproduction apparatus according to the present invention can be constructed basically with the reproduction system of the apparatus 500.

The information record reproduction apparatus 500 is provided with: an optical pickup 502; a servo unit 503; a spindle motor 504; a decoder 506; a demultiplexer 508; a video decoder 511; an audio decoder 512; a sub-picture decoder 513; an adder 514; a still picture decoder 515; a system controller 520; a memory 530; a memory 540; a memory 550; a modulator 606; a formatter 608; a TS object generator 610; a video encoder 611; an audio encoder 612; and a sub-picture encoder 613. The system controller 520 includes a file system/logical structure data generator 521 and a file system/logical structure data reader 522. Furthermore, the memory 530 and a user interface 720 to give a user input such as title information are connected to the system controller 520.

Among these constitutional elements, the decoder 506, the demultiplexer 508, the video decoder 511, the audio decoder 512, the sub-picture decoder 513, the adder 514, the still picture decoder 514, the memory 540 and the memory 550 mainly constructs the reproduction system. On the other hand, among these constitutional elements, the modulator 606, the formatter 608, the TS object generator 610, the video encoder 611, the audio encoder 612 and the sub-picture encoder 613 mainly constructs the record system. The optical pickup 502, the servo unit 503, the spindle motor 504, the system controller 520, the memory 530 and the user interface 720 to give the user input such as title information are generally shared for both the reproduction system and the record system. Furthermore, for the record system, a TS object data source 700 (or a PS object data source 700, or a still picture data source 700 such as bit map data, JPEG data and the like); a video data source 711; an audio data source 712; and a sub-picture data source 713 are prepared. Furthermore, the file system/logical structure data generator 521 disposed in the system controller 520 is used mainly in the record system, and the file system/logical structure reader 522 is used mainly in the reproduction system.

The optical pickup 502 irradiates the optical disc 100 with a light beam LB such as a laser beam, at the first power as reading light for the reproduction, and at the second power with the light beam LB being modified as writing light for recording. The servo unit 503 performs the focus servo, the tracking servo and the like for the optical pickup 502, as well as the spindle servo for the spindle motor 504, under control of the control signal Sc1 outputted from the system controller 520, during the reproduction and recording. The spindle motor 504 is controlled under the spindle servo by the servo unit 503, for rotating the optical disc 100 at a predetermined speed.

(i) Structure and Operation of Record System

Next, with reference to FIG. 14 to FIG. 18, a specific structure and the operation of each constitutional element constructing the record system of the information record and reproduction system 500 is explained in each case.

(i-1) In the Case That the Already Generated Object is Used

This case is discussed, with reference to FIG. 14 and FIG. 15.

In FIG. 14, the TS object data source 700 may be made of the memory storage such as a video tape, a memory, for storing the TS object data D1.

Firstly in FIG. 15, each title information (e.g. play list contents etc.) to be logically constructed on the optical disc 100 using the TS object data D1 is inputted into the system controller 520, as the user input I2 such as the title information, via the user interface 720. Then, the system controller 520 imports the user input I2 such as the title information via the user interface 720 (step S21: Yes, and step S22). In this case, the user interface 720, under control of the control signal Sc4 from the system controller 520, can perform the input operation in response to the contents to be recorded, such as the selection via the title menu screen. Incidentally, if the user input is already performed (step S21: No), these processings are omitted.

Next, the TS object data source 700 outputs the TS object data D1, under control of the control signal Sc8 to indicate the data reading from the system controller 520. Then, the system controller 520 imports the TS object data D1 from the TS object data source 700 (step S23), and performs the data array analysis (e.g. a record data length and the like) of the TS object data D1, the analysis of each elementary stream structure (e.g. understanding of ES_PID (elementary stream/packet identification number)), on the basis of the PAT, the PMT and the like packetized with the video data as mentioned above, due to the TS analysis feature in the file system/logical structure data generator 521 (step S24).

Next, the system controller 520 makes the file system/logical structure data generator 521 generate the disc information file 110, the play list information file 120, the object information file 130 and the file system 105 (see FIG. 3), as the logical information file data D4, on the basis of the analysis result of each elementary stream and the TS object data D1 data array, as well as the user input I2 such as the imported title information (step S25). The memory 530 is used to generate this logical information file data D4.

Incidentally, variations in which the data about each elementary stream structure information and the TS object data D1 data array may be prepared in advance are naturally understood or suggested, all of which are encompassed within a scope of the embodiment.

In FIG. 14, the formatter 608 is for formatting the data array to store both the TS object data D1 and the logical information file data D4 on the optical disc 100. More specifically, the formatter 608 is provided with a switch Sw1 and a switch Sw2 and is switching-controlled by a switch control signal Sc5 from the system controller 520. When formatting the TS object data D1, it connects the switch Sw1 to a {circle around (1)} side and the switch Sw2 to the {circle around (1)} side so as to output the TS object data D1 from the TS object data source 700. Incidentally, the transmission control of the TS object data D1 is performed by the control signal Sc8 from the system controller 520. On the other hand, when formatting the logical information file data D4, the formatter 608 is switching-controlled by the switch control signal Sc5 from the system controller 520, and connects the switch Sw2 to a {circle around (2)} side so as to output the logical information file data D4.

At step S26 in FIG. 15, (i) the logical information file data D4 from the file system/logical structure data generator 521 at the step S25 or (ii) the TS object data D1 from the TS object data source 700 is outputted through the formatter 608, under the switching-control by the formatter 608 as constructed above (step S26).

The selection output from the formatter 608 is transmitted to the modulator 606 as disc image data D5, and modulated by the modulator 606, and recorded onto the optical disc 100 through the optical pickup 502 (step S27). The system controller 520 also executes the disc record control in this case.

Then, if both the logical information file data D4 generated at the step S25 and the corresponding object data D1 have not been completely recorded yet, the operational flow returns to the step S26 to continue the recording (step S28: No). Incidentally, there is no preference in the record sequence of the logical information file data D4 and the corresponding object data D1.

On the other hand, if the both have been already recorded, it is judged whether or not the recording onto the optical disc 100 is to be ended, on the basis of the presence or absence of an end command (step S29). If it is not to be ended (step S29: No), the operational flow returns to the step S21 to continue the recording. On the other hand, if it is to be ended (step S29: Yes), a series of record processing ends.

As described above, the information record reproduction apparatus 500 performs the record processing in the case of using the already prepared TS object.

Incidentally, the example in FIG. 15 shows that the logical information file data D4 and the corresponding object data D1 are outputted at the step S26, after preparing the logical information file data D4 at the step S25. However, it is also possible to output the object data D1 and/or record the object data D1 onto the optical disc 100 before the step S25, so that the logical information file data D4 is generated and/or recorded after or in parallel with this recording.

Additionally, a PS object data source or a still picture data source may be used instead of the TS object data source 700. In this case, the recording processing the same as in the case of the TS object data D1 as mentioned above is performed for the PS object data, or the sill picture data such as bit map data, JPEG data and the like, instead of the TS object data D1. Furthermore, instead of the TS object 142, the PS object data or the still picture data is stored in the object data file 140. Then, various logic information about the PS object data or the still picture data is generated under control of the system controller 520, and stored in the disc information file 110, the play list information file 120, the object information file 130 and the like.

(i-2) The Case of Receiving and Recording the Transport Stream on Air

This case is explained with reference to FIG. 14 and FIG. 16. Incidentally, in FIG. 16, the same steps as those in FIG. 15 have the same step reference numbers, and their explanation is omitted as occasion demands.

Again, in this case, the similar processing is performed, as is “the case of using the already prepared object” described above. Therefore, the following explanation is focused on the differences from this case.

In the case of receiving and recording the transport stream on air, the TS object data source 700 is provided with a receiver (set top box) for receiving the digital broadcast on air, for example, receives the TS object data D1, and transmits it to the formatter 608 in real time (step S41). At the same time, reception information D3 (i.e. information corresponding to the data transmitted through the receiver and the interface of the system controller 520) including the program construction information and the belowmentioned ES_PID information, which are deciphered upon receiving, is imported into the system controller 520 and is stored into the memory 530 (step S44).

In the meantime, the TS object data D1 outputted to the formatter 608 is outputted to the modulator 606 under the switching-control by the formatter 608 (step S42), and is recorded onto the optical disc 100 (step S43).

Along with these operations, using the program construction information and the ES_PID information included in the reception information D3 imported upon receiving and stored in the memory 530, the file system/logical structure data generator 521 prepares the logical information file data D4 (step S24 and step S25). Then, after the completion of recording a series of the TS object data D1, this logical information file data D4 is additionally recorded onto the optical disc 100 (step S46 and step S47). Incidentally, these steps S24 and S25 may be performed after the step S43.

Moreover, as the occasion demands (e.g. in the case of editing one portion of the title, or the like), by adding the user input I2 of the title information and the like from the user interface 720 to the program construction information and the ES_PID information stored in the memory 530, it is possible to prepare the logical information file data D4 by the system controller 520 and additionally record this onto the optical disc 100.

As described above, the information record reproduction apparatus 500 performs the record processing in the case of receiving the transport stream on air and recording it in real time.

Incidentally, if all the reception data obtained when broadcasting is once stored into an archive apparatus, and then, if this is used as the object source 700, the same processing as that in “the case of using the already prepared object” will do.

(i-3) The Case of Recording the Video Data, the Audio Data and the Sub-Picture Data

This case is explained with reference to FIG. 14 and FIG. 17. Incidentally, in FIG. 17, the same steps as those in FIG. 15 have the same step reference numbers, and their explanation is omitted as occasion demands.

In the case of recording the video data, the audio data, and the sub-picture data, which are individually prepared in advance, the video data source 711, the audio data source 712, and the sub-picture data source 713 are individually provided with the memory storage, such as a video tape and a memory, and store a video data DV, an audio data DA, and a sub-picture data DS, respectively.

These data sources are controlled by the control signal Sc8 giving an instruction for reading out the data from the system controller 520, and they transmit the video data DV, the audio data DA, and the sub-picture data DS, to the video encoder 611, the audio encoder 612, and the sub-picture encoder 613, respectively (step S61). Then, the video encoder 611, the audio encoder 612, and the sub-picture encoder 613 execute a predetermined type of encode processing (step S62).

The TS object generator 610 is controlled by a control signal Sc6 from the system controller 520 and converts the data encoded in this manner to the TS object data constituting the transport stream (step S63). In this case, the data array information of each TS object data (e.g. a record data length and the like) and the construction information of each elementary stream (e.g. the ES_PID, as described later, and the like) are transmitted as information I6 from the TS object generator 610 to the system controller 520 and are stored into the memory 530 (step S66).

On the other hand, the TS object data generated by the TS object generator 610 is transmitted to the {circle around (2)} side of the switch Sw1 of the formatter 608. Namely, when formatting the TS object data from the TS object generator 610, the formatter 608 is switching-controlled by the switch control signal Sc5 from the system controller 520 to shift the switch Sw1 to the {circle around (2)} side and the switch Sw2 to the {circle around (1)} side, thereby outputting the TS object data (step S64). Then, this TS object data is recorded onto the optical disc 100 through the modulator 606 (step S65).

Along with these operations, using the data array information of each TS object data and the construction information of each elementary stream imported as the information I6 into the memory 530, the file system/logical structure data generator 521 prepares the logical information file data D4 (step S24 and step S25). Then, after the completion of recording a series of the TS object data D2, the logical information file data D4 is additionally recorded onto the optical disc 100 (step S67 and step S68). Incidentally, the step S24 and the step S25 may be processed after the step S65.

Moreover, as the occasion demands (e.g. in the case of editing one portion of the title), by adding the user input I2 such as the title information and the like from the user interface 720 to these information stored in the memory 530, it is possible to prepare the logical information file data D4 by the file system/logical structure generator 521 and additionally record this onto the optical disc 100.

As described above, the information record reproduction apparatus 500 performs the record processing in the case of recording the video data, the audio data, and the sub-picture data, which are individually prepared in advance.

Incidentally, this record processing is applicable even when recording an arbitrary content the user has.

(i-4) The Case of Recording the Data by Authoring

This case is explained with reference to FIG. 14 and FIG. 18. Incidentally, in FIG. 18, the same steps as those in FIG. 15 have the same step reference numbers, and their explanation is omitted as occasion demands.

In this case, by combining the above described three types of record processing in the three cases, an authoring system generates the TS object, the logical information file data, and the like in advance (step S81), and then completes the processing until switching-control performed at the formatter 608 (step S82). Then, the information obtained by this operation is transmitted, as the disc image data D5, to the modulator 606 equipped in front of and/or behind an original disc cutting machine (step S83), and this cutting machine prepares the original disc (step S84).

(ii) Structure and Operation in Reproduction System

Next, the specific structure and operation of each constitutional element constituting the reproduction system of the information record reproduction apparatus 500 is explained with reference to FIG. 14 and FIG. 19.

In FIG. 14, via the user interface 720, the title to be reproduced from the optical disc 100, its reproduction condition and the like are inputted to the system controller 520, as the user input I2 such as the title information and the like. In this case, under control of the control signal Sc4 from the system controller 520, the input processing suitable for the content to be reproduced, such as a selection on a title menu screen, can be achieved by the user interface 720.

Responding to this, the system controller 520 controls the disc reproduction with respect to the optical disc 100, and the optical pickup 502 transmits a reading signal S7 to the demodulator 506.

The demodulator 506 demodulates a recorded signal recorded onto the optical disc 100 from this reading signal S7, and outputs it as demodulated data D8. The logical information file data (i.e. the file system 105, the disc information file 110, the P list information file 120, and the object information file 130, shown in FIG. 3) included in this demodulated data D8 as being a not-multiplexed information part is supplied to the system controller 520. On the basis of this logical information file data, the system controller 520 executes various reproduction control, such as processing of determining a reproduction address and controlling the optical pickup 502.

On the other hand, depending on whether the TS object data is included as the multiplexed information part in the demodulated data D8, or whether the still picture data is included, or whether both data are included, the shift switch Sw3 is shifted to {circle around (1)} side (demultiplexer 508 side) or shifted to {circle around (2)} side (still decoder 515 side), under control of the control signal Sc10 from the system controller 520. Thereby, the TS object data is selectively supplied to the demultiplexer 508, and the still picture data is selectively supplied to the still picture decoder 515.

Then, as for the TS object data included as the multiplexed information part in the demodulated data D8, the demultiplexer 508 demultiplexes the TS object data, under control of the control signal Sc2 from the system controller 520. Here, when the access to the reproduction position address is terminated under the reproduction control by the system controller 520, the control signal Sc2 is transmitted to start the demultiplexing.

The video packet, the audio packet and the sub-picture packet are transmitted respectively from the demultiplexer 508 and supplied respectively to the video decoder 511, the audio decoder 512 and the sub-picture decoder 513. Then, the video data DV, the audio data DA and the sub-picture data DS are decoded, respectively. In this case, the sub-picture data DS is supplied to the adder 514 via the memory 540. The sub-picture data DS is outputted from the memory 540, selectively or at a predetermined timing, under control of the control signal Sc5 from the system controller 520, so as to be super-imposed on the video data DV, if needed. That is, in comparison with a case that the sub-picture data outputted from the sub-picture decoder 513 is directly super-imposed, it is easy to control the timing of the super-imposing, or to judge the need for the super-imposing. For example, under output control of the control signal Sc5, it is possible to select whether or not a caption using the sub-picture is displayed over the main picture, or whether or not a menu screen using the sub-picture is displayed.

Incidentally, although the packets obtained by packetizing the PAT or the PMT, included in the transport stream shown in FIG. 6, are included as a part of the demodulated data D8, respectively, they are discarded or abandoned at the demultiplexer 508.

The adder 514 is controlled by a control signal Sc3 giving an instruction of the mixing from the system controller 520, and mixes or superimposes in a predetermined timing the video data DV and the sub-picture data DS, which are respectively decoded at the video decoder 511 and the sub-picture decoder 513. The result is outputted as a video output from the information record reproduction apparatus 500 to a TV monitor, for example.

On the other hand, the audio data DA decoded at the audio decoder 512 is outputted as an audio output from the information record reproduction apparatus 500 to an external speaker, for example.

In the case that the still picture data is included in the decoded data D8, the still picture data is supplied to the still picture decoder 515, via the shift switch Sw3 controlled by the control signal Sc10 from the system controller 520, instead of or in addition to such a reproduction operation or processing of the video data DV or the sub-picture data DS. Then, the still picture data such as the decoded bit map data, JPEG data and the like is added to the adder 514 via the shift switch Sw4, without subjected to any processing, under control of the control signal Sc11 from the system controller 520. Alternatively, it may be temporarily stored in the memory 550 via the shift switch Sw4. The still picture data is outputted from the memory 550, selectively or at a predetermined timing, under control of the control signal Sc12 from the system controller 520, and then supplied to the adder 514 via the shift switch Sw5. Thereby, if needed, the video data DV or the sub-picture data DS is super-imposed over the still picture data or vice versa. That is, in comparison with a case that the still picture data outputted from the still picture decoder 515 is directly super-imposed, it is easy to control the timing of the super-imposing, or to judge the need for the super-imposing. For example, under output control of the control signal Sc12, it is possible to select whether or not a still picture such as a menu screen or a window screen using the still picture data or a still picture as a background image using the still picture data is displayed on the main picture of the sub-picture.

Additionally, under control of the control signal Sc13 from the system controller 520, the still picture data may be outputted via another route (not shown), with the aid of the shift switch Sw5 shifted to {circle around (2)} side. Alternatively, no still picture data may be outputted from the shift switch Sw5 shifted to {circle around (2)} side.

Here, the specific example of a reproduction processing routine by the system controller 520 is explained with reference to a flow chart of FIG. 19.

In FIG. 19, it is assumed that as an initial condition, the recognition of the optical disc 100 in the reproduction system and the recognition of a volume structure and a file structure by the file system 105 (see FIG. 3) have been already completed by the system controller 520 and the file system/logical structure data reader 522 inside of the system controller 520. Here, an explanation is made on the operational flow after obtaining the total number of the total titles from the disc general information 112 in the disc information file 110 and then choosing or selecting one title from among them.

Firstly, the choice or selection of the title is performed via the user interface 720 (step S211). Responding to this, the system controller 520 obtains the information about the reproduction sequence from a reading result of the file system/logical structure data reader 522. Incidentally, in the selection of the title 200, the desired title element(s) 200-2 (see FIG. 4) may be selected from among a whole title elements 200-2 composing the title 200, with the aid of an external input operation by the user with using a remote controller and the like, or one title element 200-2 may be selected automatically depending on a system parameter or the like adjusted for the information record reproduction apparatus 500.

Then, contents of a plurality of play lists 126 composing a play list set 126S corresponding to the selected title 200 (title element 200-2) are obtained. Here, as a processing at a logic hierarchy, the information about the each play list 126 structure and each item composing each play list (see FIG. 5, FIG. 6 and FIG. 13) is obtained (step S212).

Then, contents of the play list 126 to be reproduced is obtained from among a plurality of play lists 126 obtained at step S212. For example, herein, the reproduction is started from a play list #1, and the contents of the corresponding play list 126 is obtained (step S213). The contents of the play list 126 may be one or more play list elements 126-2 (see FIG. 5), which are obtained by the obtaining processing at step S213.

Then, the pre-command 126PR (see FIG. 5) included in this play list 126 is executed (step S214). Incidentally, it is possible for the pre-command 126PR to select one from among a plurality of play lists 126, which composes the play list set 126S with a certain relationship of the plurality of play lists 126. If the play list element 126-2 composing the play list 126 does not have the pre-command 126PR, this processing is omitted.

Then, the TS object 142 (see FIG. 3 and FIG. 10) to be reproduced is determined (step S215), on the basis of the item 204 (see FIG. 5 to FIG. 7) identified by the play list 126 obtained at step S213. More specifically, on the basis of the item 204, the object information file 130 (see FIG. 3) relating to the TS object 142 as the reproduction target is obtained and a stream number, address and the like of the TS object 142 to be reproduced are identified.

Incidentally, in this embodiment, also the belowmentioned AU (Association Unit) information 132I and PU (Presentation Unit) information 302I are obtained as the information stored in the object information file 130. On the basis of these informations, the aforementioned logic hierarchy is associated with the object hierarchy (see FIG. 13).

Then, the reproduction of the TS object 142 determined at step S215 is actually started. That is, on the basis of the processing at the logic hierarchy, the processing at the object hierarchy is started (step S216).

During the reproduction of the TS object 142, it is judged whether or not the next item 204 composing the play list 126 to be reproduced exists (step S217). Then, insofar as the next item 204 exists (step S217: Yes), the process goes back to the step S215 to repeat the aforementioned determination and the reproduction of the TS object 142.

On the other hand, at the judgement at step S217, if it is judged that the next item 204 does not exist (step S217: No), the post command 126PS (see FIG. 5) corresponding to the presently executed play list 126 is executed (step S218). Incidentally, if the play list element 126-2 composing the play list 126 does not have the post command 126PS, this processing is omitted.

Then, it is judged whether or not the next play list 126 composing the selected title 200 exists (step S219). If exists (step S219: Yes), the process goes back to the step S213 to repeat the processings following obtaining the play list 126 to be reproduced.

On the other hand, at the judgement at step S219, if it is judged that the next play list 126 does not exist (step S219: No), i.e. if the all play lists 126 to be reproduced corresponding to the title 200 selected at step S211 are completely reproduced, a series of reproduction operations or processings is terminated.

As discussed above, the information record reproduction apparatus 500 in this embodiment reproduces the optical disc 100.

Particularly in this embodiment, (i) with regard to the structure and operation of the record system mentioned above, for example in the case of a DVD-ROM application (i.e. in the case of (i-4)), the content information composing a plurality of blocks, such as a plurality of parental blocks or angle blocks is recorded as the transport streams and the like. On the other hand, for example in the case of a DVD recorder application (i.e. in the case of (i-2)), the content information composing a plurality of programs streamed into the same transfer wave or the same transfer signal is recorded as the transport stream or the like. Alternatively, a plurality of various content informations about the same title, which are prepared for each function demand such as a video reproduction function demand (video performance) or an audio reproduction function demand (audio performance) required for the information reproduction system, are recorded as the transport streams or the like, such as a pair of the high-vision compatible content information and the normal video compatible content information, a pair of the surround speaker compatible content information and the monaural compatible content information. Then, in such a recording, it is recorded logically as one title 200 from the start of the recording to the end of the recording, and a plurality of play list sets 126S each including a plurality of play lists 126 for the plurality of content information are recorded.

Particularly in this embodiment, (ii) with regard to the structure and operation of the reproduction system, in the processing of the logic hierarchy from the step S211 to the step S214 of FIG. 19 and the processing of associating the logic hierarchy with the object hierarchy at the step S215, any one of a plurality of play lists 126 included in each play list set 126S designated by the title 200 is selected, and the content information is reproduced in the reproduction sequence defined by the selected play list. For example, in the DVD recorder application or the DVD-ROM application, the desired content information can be reproduced as the title 200, by selecting the play list information, from among a plurality of play list informations included in each play list set 126S recorded as one title, which corresponds to the desired content information, such as a desired program, a desired parental block, a desired angle block, a version actually reproducible in each information reproduction system in view of the functionality, a version capable of using fully or efficiently the functionality of each information reproduction system.

(Selection Scheme of Play List in Play List Set)

Now, with reference to FIG. 20 to FIG. 29, an explanation is made on various specific examples of the aforementioned information record reproduction apparatus 500 to select appropriately the play list 126 corresponding to the desired content information from among the play list set 126S included in the reproduced play list information file 120. The present invention is not limited to the specific examples explained herein. For example, the advantage of the present invention obtained by collecting as a play list set 126S the play lists 126 which define the reproduction sequences of the content informations each having a strong relationship to each other, such as a plurality of programs recorded in the same time zone, or the parental block or angle block, is exhibited also by other selection scheme, appropriately depending on the content of those selection schemes.

Particularly in the following three selection schemes, the play list is selected, on the basis of the data structure of the title element 200-2 discussed with reference to FIG. 8, and the reproduction operation of the information reproduction apparatus 500 discussed with reference to FIG. 14 based on the title element 200-2.

(First Selection Scheme)

Firstly, with reference to FIG. 20 to FIG. 22, an explanation is made on the first selection scheme. FIG. 20 schematically illustrates a data logical structure in an example of the title element 200-2 (see FIG. 8) used in the first selection scheme. FIG. 21 is a flow chart indicating a reproduction operation by one play list in the first selection scheme. FIG. 22 is a flow chart indicating a selection operation to select said one play list.

As shown in FIG. 20, the title element 200-2 a in the first selection scheme includes, as in the case of the title element 200-2 as shown in FIG. 8, the pre-command 200PR, the play list set 126S designated by the pointer 200PT, the post command 200PS and the next information 200-6N. Particularly in the title element 200-2 a, the pre-command 200PR is provided with a play list selection commands list in which selection conditions are described for each play list 126, in addition to the commands.

Therefore, as a command processing by the pre-command 200PR disposed at the head of each title element 200-2 a, it is possible to select one play list 126 from among the play list set 126S, depending on any condition reproducible in the system, such as the video resolution.

As shown in FIG. 21, in the first selection scheme, once the reproduction of the title element 200-2 a is started as a part of the title reproduction, the pre-command is firstly executed (step S101). Then, the play list 126 which is selected by the execution of the pre-command, is reproduced (step S102). Then, the post command 200PS is executed. Furthermore, the next information 200-6N is referred to (step S104), and the reproduction of the title element 200-2 a is terminated, and the process is advanced to the reproduction of the next title element 200-2 a.

The selection of the play list by the pre-command 200PR may be performed as follows.

That is, in FIG. 22, the play list selection condition recorded in the pre-command 200PR is firstly read one by one for each play list (step S111). In parallel with this, the selection judgement information is inputted into the information record reproduction apparatus 500 (step S112). The selection judgement information may be user input information designating one program from among programs recorded in the same time zones, or user input information to select the parental block or angle block. Alternatively, it may be a system parameter set in dependence upon the function of the information record reproduction apparatus 500 such as the reproducible resolution, the reproducible channel number or the like, or the set information to indicate a reproducible function set by the user.

Then, the informations obtained at the step S111 and S112 are compared with each other to judge whether or not the content of the selection judgement information obtained at the step S112 is matched to the play list selection condition read at the step Sill (step S113). If it matches (step S113: Yes), the play list 126 having the matching selection condition is selected (step S114), and a series of selection processings is terminated.

On the other hand, if it does not match (step S113: No), it is judged whether or not it is the last selection condition #n recorded in the pre-command 200PR (step S115). If it is not the last selection condition #n (step S115: No), the process goes back to the step S111 to read out the next play list selection condition, and the processings after then are repeatedly performed.

In such a repeat of processings, if it is the last selection condition #n (step S115: Yes), the selection judgement information from the information record reproduction apparatus 500 does not match any play list selection condition. For this, after a predetermined alternative processing is executed (step S116), a series of selection processings is terminated.

As discussed above, according to the first selection scheme, it is possible to select the play list 126, title element 200-2 a of which corresponds to a desired content information such as a desired program, a desired parental block, a desired angle block, from among a plurality of play lists 126 included in the play list set 126S, in accordance with the pre-command 200PR. Alternatively, in view of the video reproduction function or the audio reproduction function, it is possible to select the play list 126 corresponding to the content information reproducible by the information record reproduction apparatus 500.

(Second Selection Scheme)

Now, with reference to FIG. 23 to FIG. 25, an explanation is made on the second selection scheme. FIG. 23 schematically illustrates a data logical structure in another example of the title element 200-2 (see FIG. 8) used in the second selection scheme. FIG. 24 is a flow chart indicating a reproduction operation by one play list in the second selection scheme. FIG. 25 is a chart indicating a selection operation to select said one play list.

As shown in FIG. 23, the title element 200-2 b in the second selection scheme includes, as in the case of the title element 200-2 shown in FIG. 8, the pre-command 200PR, the play list set 126S designated by the pointer 200PT, the post command 200PS and the next information 200-6N.

Particularly in the title element 200-2 b, the attribute information is added to each play list 126 stored in the play list set 126S. Here, the “attribute information” is information to indicate an attribute of the content information relating to the play list, for example, with regard to the video performance, what extent of video resolution is achieved, what extent of view angle is achieved respectively for progressive/interleave, what extent of the refresh rate is achieved, what codec is employed, or whether it is compatible with the hi-vision or normal vision. On the other hand, with regard to the audio performance, it means an information to indicate the attribute of the content information relating to the play list indicating what the channel assignment is employed, what codec is employed, what the sampling frequency is employed, what sample bit is employed, or whether it is compatible with surround speakers or stereo or monaural.

Furthermore, particularly in the title element 200-2 b, the play list set control information 126SD-1 including a selectable flag to indicate whether or not a plurality of play lists 126 are selectable is stored.

Therefore, at the reproduction of the information record medium, the selection processing can be performed appropriately, in accordance with the selectable flag in the play list set control information 126SD-1, for example. Furthermore, if the selectable flag indicates that it is selectable, the information record reproduction apparatus 500 compares the system parameter such as the video resolution with the attribute information, and thereby selects the play list 126 optimum to the information record reproduction apparatus 500 in the play list set 126S. Alternatively, depending on the attribute information added to the play list 126, the control is allowed for selecting the play list 126 corresponding to the desired content information, such as the desired program, the desired video resolution, the desired parental block, the desired angle block or the like, from among the play lists 126 included in the play list set 126S.

Incidentally, if the selectable flag does not indicate that it is selectable, the play list set control information 126SD-1 further retains the number of the play list 126 to be selected uniquely. Such play list set control information 126SD-1 is stored for each title element 200-2 b.

As shown in FIG. 24, in the second selection scheme, once the reproduction of the title element 200-2 b is started as a part of the title reproduction, it is firstly judged whether or not the play list is selectable by referring to the selectable flag (step S121). Here, if it is judged selectable (step S121: Yes), the play list 126 is selected from the play list set 126S (step S123). Then, the pre-command 200PR included in the play list set 126S is executed (step S124). Next, the selected play list 126 is reproduced (step S125), and then the post command 200PS is executed (step S126). Furthermore, the next information 200-2 b is referred to (step S127) to terminate the reproduction of the title element 200-2 b, and the process is advanced to the next title element 200-2 b.

On the other hand, if not selectable at the step S121 (step S121: No), the play list number to be selected uniquely and stored in the play list set control information 126SD-1 is referred to (step S122), so that the processings after the step S124 is continued under assumption that the play list 126 of this number is selected.

From among these processings, the selection of the play list on the basis of the attribute information of the play list 126 and the play list set control information 126SD-1 may be performed as follows.

That is, in FIG. 25, the attribute informations added to each play list 126 are read for each play list in the play list set 126S (step S131). In parallel with this, the selection judgement information is inputted into the information record reproduction apparatus 500 (step S132). The selection judgement information may be user input information to indicate one program from among programs recorded in the same time zone, or user input information to select the parental block or angle block. Alternatively, it may be a system parameter set in dependence upon the function of the information record reproduction apparatus 500 such as the reproducible resolution, the reproducible channel number or the like, or the set information to indicate a reproducible function set by the user. Then, the informations obtained at the step S131 and the step S132 are compared with each other to judge whether or not the contents of the selection judgement information obtained at the step S132 matches with the attribute of the play list indicated by the attribute information read at the step S131 (step S133). If it matches (step S133: Yes), the play list 126 having the matching attribute is selected (step S134), and a series of selection processings is terminated.

On the other hand, if it does not match (step S133: No), it is judged whether or not it is the last play list 126 (i.e. play list #m) in the play list set 126S (step S135). If it is not the last play list 126 (step S135: No), the process goes back to the step S131 to read the attribute information of the next play list, and the processings after then are repeatedly performed.

In such a repeat of processings, if it is the last play list 126 (step S135: Yes), the selection judgement information from the information record reproduction apparatus 500 does not match any play list attribute. For this, after a predetermined alternative processing is executed (step S136), a series of selection processings is terminated.

As discussed above, according to the first selection scheme, it is possible to select the play list 126, title element 200-2 a of which corresponds to a desired content information such as a desired program, a desired parental block, a desired angle block, from among a plurality of play lists 126 included in the play list set 126S, in accordance with the attribute information and the selectable flag. Alternatively, in view of the video reproduction function or the audio reproduction function, it is possible to select the play list 126 corresponding to the content information reproducible by the information record reproduction apparatus 500.

(Third Selection Scheme)

Now, with reference to FIG. 26 to FIG. 29, an explanation is made on the third selection scheme. FIG. 26 schematically illustrates a data logical structure in another example of the title element 200-2 (see FIG. 8) used in the third selection scheme. FIG. 27 schematically illustrates the detail of the data structure of the play list set control information thereamong. FIG. 28 is a flow chart indicating a reproduction operation by one play list in the second third scheme. FIG. 29 is a chart indicating a selection operation to select said one play list.

As shown in FIG. 26, the title element 200-2 c in the third selection scheme includes, as in the case of the title element 200-2 shown in FIG. 8, the pre-command 200PR, the play list set 126S designated by the pointer 200PT, the post command 200PS and the next information 200-6N.

Particularly in the title element 200-2 c, the play list set control information 126SD-2 is stored to store the select conditions for each play list.

As shown in FIG. 27, with regard to the play list set control information 126SD-2, the selection conditions #1 to #m, such as the video resolution required for the reproduction, whether or not the high vision is required for the reproduction, whether or not the surround speaker is required for the reproduction, whether or not the stereo is required for the reproduction, are stored in association with the play list numbers #1 to #m. More specifically, for example, there are stored (i) parameter numbers of various selection conditions to which numbers are assigned in advance, (ii) what kind of arithmetic comparison is to be performed, and (iii) a reference value (threshold value) or other parameter numbers for the arithmetic comparison. One play list 126 is selectable by means of one or more these conditions.

For this, in accordance with the play list set control information 126SD-2, by comparing the system parameter or the like which is set for the function of the player in the information record reproduction apparatus 500 with these selection conditions, one play list 126 can be selected from the play list set 126S. Incidentally, it is sufficient to describe the information such as a selection condition or the like about the play list 126 to be used to reproduce the title element 200-2 c.

Therefore, at the reproduction of the information record medium, it is possible to select the play list 126 corresponding to the desired content information, such as a desired program, a desired parental block or a desired angle block, or the content information capable of utilize the full function of the information record reproduction apparatus 500, from among a plurality of play lists 126 in each play list set 126S, in accordance with the selection condition described in the play list set control information 126SD-2.

As shown in FIG. 28, in the third selection scheme, once the reproduction of the title element 200-2 c is started as a part of the title reproduction, the selection condition of the play list set control information 126SD-2 in the title element 200-2 c is referred to and the play list 126 is selected from the play list set 126S (step S141). Then, the pre-command 200PR included in the play list set 126S is executed (step S142). Then, the selected play list 126 is reproduced (step S143), and then the post command 200PS is executed (step S144), and further the next information 200-6N is referred to (step S145), and the reproduction of the title element 200-2 c is terminated and the process goes to the reproduction of the next title element 200-2 c.

From among these processings, the selection of the play list in accordance with the selection condition of the play list set control information 126SD-2 may be performed as follows.

That is, in FIG. 29, the selection condition of the play list set control information 126SD-2 is firstly read for each play list (step S151). In parallel with this, the selection judgement information is inputted into the information record reproduction apparatus 500 (step S152). The selection judgement information may be user input information to indicate one program in programs recorded in the same time zone, or user information to select the parental block or the angel block. Alternatively, it may be a system parameter set in dependence upon the function of the information record reproduction apparatus 500 such as the reproducible resolution, the reproducible channel number or the like, or the set information to indicate a reproducible function set by the user.

Then, the informations obtained at step the S151 and the step S152 are compared to each other, it is judged whether or not the contents of the selection judgement information obtained at the step S152 matches with the play list selection condition read at the step S151 (step S153). If it matches (step S153: Yes), the play list 126 having the matched selection condition is selected (step S154), and a series of selection processings is terminated.

On the other hand, if it does not match (step S153: Yes), it is judged whether or not it is the selection condition of the last play list 126 (i.e. play list #m) in the play list set control information 126SD-2 (step S155). If it is not the play list (step S155: No), the process goes back to the step S151 to read the selection condition of the next play list 126 and the processings after then are repeatedly performed.

In the repeat of these processings, if it is the last play list 126 (step S155: Yes), the selection judgement information from the information record reproduction apparatus 500 does not match with any play list selection condition. For this, after a predetermined alternative processing is executed (step S156), a series of selection processings is terminated.

As discussed above, according to the first selection scheme, it is possible to select the play list 126, title element 200-2 a of which corresponds to a desired content information such as a desired program, a desired parental block, a desired angle block, from among a plurality of play lists 126 included in the play list set 126S, in accordance with the selection condition for each play list. Alternatively, in view of the video reproduction function or the audio reproduction function, it is possible to select the play list 126 corresponding to the content information reproducible by the information record reproduction apparatus 500.

(Access Flow on Reproduction)

Next, with reference to FIG. 30, the access flow on reproduction by the information record reproduction apparatus 500, employing the AU information 132 and the PU information 302, is explained as one of the features of this embodiment, with the logical structure of the optical disc 100. FIG. 30 schematically illustrates an entire access flow on reproduction, in relation to the logical structure of the optical disc 100.

In FIG. 30, the logical structure of the optical disc 100 is categorized roughly into the following three hierarchies: a logic hierarchy 401; an object hierarchy 403; and a logic-object association hierarchy 402 mutually associating those two hierarchies.

Among them, the logic hierarchy 401 is a hierarchy for logically specifying various logical information to reproduce the desired title during the reproduction, as well as the play list (P list) to be reproduced and its constitutional contents. In the logic hierarchy 401, disc information 110 d indicating the entire titles 200 and the like on the optical disc 100 is written within the disc information file 110 (see FIG. 3), and further, reproduction sequence information 120 d of the entire contents on the optical disc 100 is written within the play list information file 120 (see FIG. 3). More specifically, the construction of one or more play list sets 126S is written, as the reproduction sequence information 120 d, respectively for one or more title elements 200-2 included in each title 200. Furthermore, each play list set 126S includes one or more play lists 126, in each of which the construction of one or more items 204 (see FIG. 13) is written. Then, at the time of the access during the reproduction, the logic hierarchy 401 as described above specifies the title 200 to be reproduced, the play list 126 corresponding to this, and further the item 204 corresponding to this.

Next, the logic-object association hierarchy 402 is a hierarchy for specifying the attribute and the physical storage address of the TS object data 140 d to be reproduced, so as to specify the combination and/or the construction of the TS object data 140 d as the entity data and perform an address conversion to the object hierarchy 403 from the logic hierarchy 401, on the basis of the information specified in the logic hierarchy 401 as described above. More specifically, in the logic-object association hierarchy 402, the object information data 130 d, which separates a group of the contents composing each item 204 into units of the AU 132 and which finely separates each AU 132 into units of the PU 302, is written in the object information file 130 (see FIG. 3).

Here, the “PU (Presentation Unit) 302” is a unit associating and uniting a plurality of elementary streams by the reproduction switchable unit. If there are three audio streams in the PU 302, the user can freely switch these three audio (e.g. audio for each language), during the reproduction of this vision.

On the other hand, the “AU (Associate Unit) 132” is a unit uniting a plurality of elementary streams such as video streams in the TS object used in one title, and made of one or more PUs 302. More specifically, it is a unit uniting the elementary stream packet IDs (ES_PID) for each TS object, indirectly via the PU 302. This AU 132 corresponds to an assembly made of a plurality of programs having a specific inter-relationship in view of the contents, such as a plurality of programs switchable to each other in the multi-source broadcasting. The PUs 302 belonged to the same AU 132 corresponds to one or more elementary stream assemblies each constructing a plurality of programs switchable to each other by the user operation during the reproduction.

Therefore, if the AU 132 to be reproduced is identified, and the PUs belonged to the AU are identified, the elementary stream to be reproduced is identified. That is, a desired elementary stream can be reproduced from the multi-recorded optical disc 100, without using the PAT or the PMT shown in FIG. 12.

Incidentally, a further specific data structure of the AU information 132I and the PU information 302I, each defining the AU 132 and the PU 302, is discussed later in detail.

The elementary stream to be actually reproduced herein is identified or designated by the ES_PID that is a packet ID (see FIG. 12) of the elementary stream, on the basis of the PU information 302. At the same time, the information indicating the start time point and the end time point of the reproduction is converted to the elementary stream address information, and thereby the contents in a specific area (or a specific time range) of a specific elementary stream is reproduced.

Thus, in the logic-object association hierarchy 402, an address conversion is performed from a logical address relating to each item 204 to a physical address relating to each PU 302.

Next, the object hierarchy 403 is a physical hierarchy to reproduce the actual TS object data 140 d. In the object hierarchy 403, the TS object data 140 d is written within the object data file 140 (see FIG. 3). More specifically, TS packets 146 constructing a plurality of elementary streams (ES) are multiplexed at every time point. The multiplexed packets are disposed on the time scale to form a plurality of elementary streams (see FIG. 11). Then, a plurality of TS packets multiplexed at each time point is associated with a PU 302 identified by the logic-object association hierarchy 402, for each elementary stream. Incidentally, it is possible to associate a plurality of PUs 302 with one elementary stream (e.g. one elementary stream relating to the same audio data is shared, or one elementary stream relating to the same sub-picture data is shared, among a plurality of switchable programs).

Thus, in the object hierarchy 403, the object data is actually reproduced, using the physical address obtained from the conversion in the logic-object association hierarchy 402.

As described above, the three hierarchies shown in FIG. 30 allow making an access to the optical disc 100 during the reproduction.

(Structure of Each Information File)

Now, an explanation is made on a specific example of a data structure of various information files constructed on the optical disc 100 in this embodiment, i.e. the data structure of (1) the play list information file 120 and the disc information file 110 discussed with reference to FIG. 3, and (2) the object information file 130, with reference to FIG. 31 to FIG. 38.

(1) Disc Information File and Play List Information File

With reference to FIG. 31 to FIG. 37, an explanation is made on each constitutional element and a hierarchy structure therebetween or thereamong in specific examples of these files. FIG. 31 to FIG. 37 are conceptual diagrams, schematically showing the hierarchy structures of these files. Incidentally, in FIG. 31 to FIG. 37, the same file, data, information, and the like as those already explained with reference to FIG. 3 to FIG. 9 and the like carry the same reference numerals, and the detailed explanations of them are omitted.

Firstly, as shown in FIG. 31, a “title information set” associated with this specific example is an information set including the disc information file 110 and the play list information file 120, shown in FIG. 3 and the like.

The title information set is provided with: one disc header 112 x; a plurality of title information 200 (title information #1, . . . , #n); a plurality of play list (P list) sets 126S (P list sets #1, . . . , #n); and other information.

(1-1) Disc Header:

Firstly, from among the title information set shown in FIG. 31, the disc header 112 x is explained with reference to FIG. 31 and FIG. 32.

In FIG. 31, the disc header 112 x is shown in a branched form on the upper right of the figure, and has a plurality of fields for various information, such as a version number, the title total number, the title information total number, and the play list (P list) set total number, in order from the top in FIG. 31, as information corresponding to the disc general information 112 shown in FIG. 3. The disc header 112 x has: a title start address table, as a table for information corresponding to the title pointer 114-1 shown in FIG. 3; and a play list (P list) set start address table, as a table for information corresponding to the play list set pointer 124 shown in FIG. 3. The disc header 112 x has a field for information which indicates a title set attribute for indicating the attribute of each title set. Moreover, the disc head 112 x has a title table 112 xtt and a play list set table 112 xpt.

As described above, the disc header 112 x having the plurality of fields and tables is to collectively manage a plurality of titles of the entire recording area on the disc.

Here, the “version number” is a version number in the standard, and according to ISO 646, it is regarded as a code “0070”, for example. The “title total number” is the total number of the titles of the entire recording area on the disc, and the “title information total number” is the total number of the title information of the entire recording area on the disc. The “play list set total number” is the total number of the play list sets of the entire recording area on the disc, and the “title start address table” indicates the start address of each title, as a relative byte number from the head of the title set. This byte number is counted from zero, for example. The “play list set start address table” indicates the start address of each play list set, as a relative byte number from the head of the title set. This byte number is counted from zero, for example. The “title set attribute” indicates the attribute of the title set, such as the data length of the title set, the type of language used in the title set (Japanese, English, etc.), and the name of the title set.

In FIG. 32, the title table 112 xtt is shown in a branched form on the upper right of the figure, and has a plurality of fields for recording a plurality of title menu start address information #1, . . . , #n, and a plurality of title content start address information #1, . . . , #n, in such a form that they make pairs for each number, in order from the top of the figure.

Here, the “title menu start address” indicates the start address of the title information including each title menu, as a relative byte number from the head of the title set. This byte number is counted from zero, for example. The title menu start address “0” is assigned to the disc menu about the entire disc. The “title contents start address” indicates the start address of the title information including each contents title, as a relative byte number from the head of the title set. Here, the “contents title” is a title for indicating the contents of each title. This byte number is counted from zero, for example. The title contents start address “0” is assigned to a first play title which is unconditionally reproduced at the initial stage of the title reproduction, for example.

In FIG. 32, the play list set table 112 xpt is shown in a branched form on the lower right of the figure, and has a plurality of fields for recording a plurality of play list (P list) set start addresses #1, . . . , #m.

Here, the “play list set start address” indicates the start address of each play list set, as a relative byte number from the head of the title set. This byte number is counted from zero, for example.

(1-2) Title Information:

Next, from among the title information set shown in FIG. 31, the title information 200 is explained with reference to FIG. 31 and FIG. 33.

In FIG. 31, the title information 200 is shown in a branched form on the center right of the figure, and has a field for recording information 200-1 x which indicates the total number of the title elements corresponding to the title general information 200-1 shown in FIG. 4, and further, a plurality of fields for recording the plurality of title elements 200-2 (title elements #1, . . . , #k) and the other information 200-5, in order from the top in FIG. 31.

Here, the “title element total number” indicates the total number of the title elements included in the title information.

In FIG. 33, each title element 200-2 is shown in a branched form on the right of the figure, and has a plurality of fields for recording the pointer 200PT in which a “play list set number” is written, the candidate total number, and P list identification information 200PN in which one or more available play list (P list) numbers (i.e. P lists #1, . . . , #k) is written, in order from the top in FIG. 32. Moreover, it has a plurality of fields for recording the P list pre-command 200PR, the P list post command 200PS, the next information 200-6N and the like for indicating the title element to be reproduced next. Incidentally, the other information in the title element 200-2 is information about each title element, such as the title type, for example, a sequential type and a branch type or the like.

Here, the “pointer 200PT in which the play list set number is written” is a pointer for indicating the identification (ID) number of the play list set. The “candidate total number” indicates the total number of the play list which can be a selection candidate of the title element in the play list set specified by the pointer 200PT. The “P list identification information 200PN” indicates the ID (identification) number of one or more play lists which can be the selection candidate. By providing such P list identification information 200PN, it is possible to include the play list which can be the selection candidate for the reproduction of different titles, in one play list set, and it is possible to share the one play list set with different title elements. On the other hand, the “P list pre-command 200PR”, the “P list post command 200PS”, and the “next information 200-6N”, and the like are the same as described above.

(1-3) Play List Set:

Next, from among the title information set shown in FIG. 31, the play list set 126S is explained with reference to FIG. 31 and FIG. 34 to FIG. 37.

In FIG. 31, the play list set 126S is shown in a branched form on the lower right of the figure, and has fields for recording information 126-1 which includes the play list (P list) total number and a plurality of play list (PL) presentations (PL presentations #1, . . . , #i), as information corresponding to the play list set general information 126-1 shown in FIG. 5, in order from the top in FIG. 31. Moreover, the play list set 126S has a plurality of fields for recording the plurality of play lists (P lists) 126 (i.e. P lists #1, . . . , #i), the item definition table 126-3, and the other information 126-4.

Here, the “play list total number” indicates the total number of the play lists in the play list set. The PL presentations #1, . . . , #i are attribute information corresponding to the P lists #1, . . . , #i, respectively, and correspond to the attribute information shown in FIG. 23.

As shown in FIG. 34, each PL presentation 126-1 xi is shown in a branched form on the upper right of the figure, and has a plurality of fields for recording information which indicates a video codec, video resolution, a video aspect ratio, a video frame rate, an audio channel assignment and so on, in order from the top in FIG. 34.

Here, the “video codec” is used in recording the video information associated with the play list set, and thus indicates the type of the video codec to be used in reproducing it. The “video resolution” indicates video resolution used in recording the video information associated with the play list corresponding to the main pass (i.e. the video stream for providing the video) from among the play list set. The “video aspect ratio” indicates a video aspect ratio used in recording the video information associated with the play list corresponding to the main pass from among the play list set. The “video frame rate” indicates a video frame rate used in recording the video information associated with the play list corresponding to the main pass from among the play list set. The “audio channel assignment” indicates the assignment of an audio channel used in recording the audio information associated with the play list corresponding to the main pass from among the play list set.

In FIG. 34, each play list 126 is shown in a branched form on the center right of the figure, and has a plurality of fields for recording information which indicates the data length of the play list 126, a play list header, the plurality of play list elements 126-2 (i.e. P list elements #1, . . . , #i) and the like, in order from the top in FIG. 34.

Here, the “length” of the play list indicates the length of the play list continuing to the next, with the byte number. This indicates the length of the data which does not include the field itself. The “play list header” indicates information about the total number of the play list elements included in the play list, the reproduction time length of the play list, the name of the play list, and the like.

Moreover, in FIG. 35, each play list element 126-2 is shown in a branched form on the right of the figure, and has a plurality of fields for recording the pointer 126PT which indicates the item number of a master play item (master P item), the sub pass total number, a plurality of sub pass information 126-2sub (i.e. sub pass information #1, . . . , #k), the next information 126-6N, the pre-command 126PR about the play item (P item), the post command 126PS about the play item (P item), and the other information 126-6, and the like.

Here, the “pointer 126PT”, the “pre-command 126PR”, and the “post command 126PS” are the same as described above. Moreover, the “sub pass total number” indicates the total number of the sub passes which exist in the play list element. The “next information 126-6N” indicates the play list element to be reproduced next.

Moreover, in FIG. 36, each sub pass information 126-2sub is shown in a form branched to the right toward the center, in the figure, and has a plurality of fields for recording a sub pass type, the slave play item (slave P item) total number, and a plurality of slave play item (slave P item) information 126-subPT (i.e. slave P item information #1, . . . , #k), in order from the top in the figure.

Here, the “sub pass type” indicates what type of display is performed by the sub pass, such as various menu display. The “slave P item total number” indicates the total number of slave play items of the sub pass.

Each slave play item (slave P item) information 126-subPT is shown in a form branched toward the right end from the center in the figure, and has a plurality of fields for recording a slave play item (slave P item) number and a start PTS of the master play item (master P item), in order from the top in the figure.

Here, the “slave P item number” indicates the ID (identification) number of the play item of the sub pass. The “start PTS (Presentation Time Stamp) of the master play item” indicates the reproduction time point of the slave item on the reproduction time scale of the master play item.

On the other hand, in FIG. 34, the item definition table 126-3 is shown in a branched form toward the lower right of the figure, and has a plurality of fields for recording the play item (P item) total number, and a plurality of play items (P items) 204 (i.e. P items #1, . . . , #n), and the like, in order from the top in the figure.

Here, the “play item total number” indicates the total number of the items 204 on the item definition table.

In FIG. 37, each item 204 is shown in a branched form to the upper right side toward the center of the figure, and has a plurality of fields for recording a play item (P item) type, a stream object play item (P item) 204-stream, and the like, in order from the top in the figure.

Here, the “play item (P item) type” indicates the type of the play item. For example, in the case of the item for the stream object for the moving picture or video, it is set to a code “00h”, and in the case of the item for the stream object for the still picture, it is set to a code “10h”. In the case of the item for the object for various menus, it is set to a code “20h”.

Moreover, the stream object play item (P item) 204-stream is shown in a form branched to the right end from the center in the figure, and has information for indicating an ES (Elementary Stream) index number, an IN time (IN point), an OUT time (OUT point), and the like, which are related to each play item, in order from the top in the figure.

Here, the “ES index number” indicates the ID (identification) number and the type of the elementary stream to which the IN time and the OUT time are applied. Moreover, the “IN time (IN point)” and the “OUT time (OUT point)” are as descried above, and the reproduction time point and the end time point of the item are written on a time basis of 90 kHz, for example.

Incidentally, in FIG. 37, the item definition table 126-3 may include an item 204-still for the still picture object, in place of such an item 204 for the stream object, i.e. the item 204 for the moving picture or video. In this case, the item 204-still has information for indicating the type of the play item, a still picture object play item (P item), and the like.

Incidentally, the data amount of each of the title information set explained above may be a fixed byte or a variable byte. Moreover, each field may have a structure in which a required number of each table can be added.

(2) Object Information File:

Next, with reference to FIG. 38, the object information file 130 is explained in detail by using one specific example. FIG. 38 schematically shows one specific example of the data structures of the AU (Associate Unit) table 131 (refer to FIG. 3) constructed in the object information file 130 and the ES (Elementary Stream) map table 134 (refer to FIG. 3) related to the AU table 134.

In this specific example, as shown in FIG. 38, the object information table is stored in the object information file 130. The object information table is provided with the AU table 131 shown in the upper part of FIG. 38 and the ES map table 134 shown in the lower part.

In the upper part of FIG. 38, the AU table 131 may have a structure that allows the required number of tables for each Field to be added. For example, if there are four AUs, it may have such a structure that the number of the Fields increases to four.

In the AU table 131, there are stored “AU table general information” in which the number of AUs and the pointer to each AU, and the like are written, and “the other information.”

The AU table 131 describes therein the Index number (Index number= . . . ) of the corresponding ES map table 134, as the AU information 132I which indicates an ES table Index #m in each PU #m corresponding to each AU #n. Here, the “AU” is a unit corresponding to a “show” in TV broadcast, for example, as mentioned above (especially, in the case of “multi-vision” broadcasting, it is a unit of a group of a plurality of “visions” which is changeable or selectable), and it includes one or more PUs, each of which is a reproduction unit. Moreover, the “PU” is a group of mutually changeable elementary streams which are included in each AU, as described above, and the ES table Index #m corresponding to each PU is specified by the PU information 3021. For example, if multi-view contents are provided with the AU, the AU stores therein a plurality of PUs, and each PU stores therein the pointers to a plurality of elementary stream packet IDs which indicates the packets constituting the contents of each view. This indicates the Index number in the ES map table 134, as described later.

In the lower part of FIG. 38, in the ES map table 134, there are stored ES map table general information, a plurality of Indexes #m (m=1, 2, . . . ), and the “other information”, for each Field.

The “ES map table general information” describes therein the size of the ES map table, the total number of Indexes, and the like.

The “Index #m” includes the elementary stream packet ID (ES-PID) of the entire elementary stream to be used for the reproduction, the corresponding Index number, and the address information of the elementary stream.

In the embodiment, for example, if the elementary stream is the video stream of the MPEG 2 as described above, only the TS packet number of the TS packet at the head of the I picture, and the corresponding display time length are written, as the address information, i.e. the ES address information 134 d, on the ES map table 134, by which the data amount is tried to be reduced.

Because of the construction as described above, it is possible to obtain the elementary stream packet ID (ES_PID) of the actual elementary stream, from the Index number of the ES map 134 specified from the AU table 131. Moreover, since the address information of the elementary stream corresponding to the elementary stream packet ID can be obtained at the same time, it is possible to reproduce the object data on the basis of these information.

According to the data structure of the optical disc 100 explained above, even in adding a new title to the optical disc 100, necessary information can be easily added, which is useful. On the other hand, even if some information becomes unnecessary as a result of editing or the like, for example, what is to be done is simply not to refer to the information, and it is not necessary to actually delete the information from the table, which is useful, as well.

Incidentally, in FIG. 38, even the ES_PID that is not referred to from the AU table 131 in the upper part is described in each Index of the ES map table 134 in the lower part; however, it is not necessary to describe the ES_PID that is not referred to, in this manner. However, if the more versatile ES map table 134 is prepared in advance by describing the ES_PID that is not referred to in this manner, it is not necessary to reconstruct the ES map table, in reediting the content, such as trying the authoring operation again, which is advantageous.

Now, an explanation is given, regarding the reproduction order of various files or the like, in the reproduction of the optical disc 100 having such a data structure as the one specific example, explained with reference to FIG. 31 to FIG. 38.

Firstly, the disc header 112 x is reproduced out of the title information set shown in FIG. 31. As a part of that, the title table 112 xtt shown in FIG. 32 is reproduced, and from it, the title menu start address or title contents start address is obtained.

Next, in accordance with the obtained address information, the reproduction of the title information 200 shown in FIG. 31 is started. More specifically, the reproduction of the title element 200-2 shown in FIG. 33 is performed, to thereby obtain the play list set number. Moreover, the pointer 200PT to the play lists #1 to #k is obtained. Incidentally, by adopting such a construction that the play list 126 is specified by the pointer 200PT, it is possible to share, among the plurality of titles, the plurality of play lists which is in the play list set specified by the reproduction of the title element 200-2 in advance.

Next, the play list set table 112 xpt shown in FIG. 32 is reproduced, to thereby obtain the play list set start address. On the basis of this, the reproduction of the play list set 126S shown in FIG. 34 is started, and the PL presentation 126-1 xi is firstly reproduced.

Then, the PL presentation 126-1 xi, one example of the required function information, is compared with the reproduction function (i.e. video performance, audio performance, and the like) of the information reproduction system during the reproduction of the optical disc 100, and thus, one optimum play list 126 is selected from the play list set 126S shown in FIG. 34.

Next, the selected play list 126 is reproduced. More specifically, the play list element 126-2 shown in FIG. 35 is reproduced. At this time, firstly, the pre command 126PR is executed, then, the master P item number shown in FIG. 36 is obtained. Then, the Item definition table shown in FIG. 37 is referred to, to thereby reproduce the relevant Item 204. The reproduction of this Item 204 is performed by reproducing the relevant TS object in accordance with the ES index number, the IN time, and the OUT time, which are obtained by reproducing the stream object P item 204-stream (see FIG. 38). Then, the post command 126PS shown in FIG. 35 is executed. Moreover, the play list element to be reproduced next is specified in accordance with the next information 126-6N, and its reproduction is repeated in the same manner.

As explained in detail with reference to FIG. 1 to FIG. 38, according to this embodiment, it is possible to efficiently record as one title a large volume of content informations including for example a plurality of programs or a plurality of parental blocks or angle blocks, and further select and reproduce a desired one of these programs and the like relatively easily.

Incidentally, in the aforementioned embodiment, the explanation is made on the optical disc 100 as an example of the information record medium and the recorder or player of the optical disc 100 as an example of the information record reproduction apparatus. Nevertheless, the present invention is not limited to the optical disc and the player or recorder thereof, but is applicable to various record media and the recorders or players thereof, supporting other high density recording or high transfer rate.

The present invention is not limited to the above-described embodiments, and various changes may be made, if desired, without departing from the essence or spirit of the invention which can be read from the claims and the entire specification. An information record medium, an apparatus for and a method of recording the information, an apparatus for and a method of reproducing the information, an apparatus for and a method of recording and reproducing the information, a computer program for controlling the record or the reproduction, and a data structure including a control signal, all of which involves such changes, are also intended to be within the technical scope of the present invention.

INDUSTRIAL APPLICABILITY

An information record medium, a apparatus for and a method of recording the information, an apparatus for and a method of reproducing the information, an apparatus for and a method of recording and reproducing the information, a computer program for controlling the record or the reproduction, and a data structure including a control signal, all of which are according to the present invention, can be applied to a high-density optical disc for consumer or industrial use, such as a DVD, on which various information, such as the video information, the audio information and the sub-picture information, can be recorded at high density and further can be applied to a DVD player, a DVD recorder, and the like. Moreover, they can be applied to an information record medium, an information record reproduction apparatus, or the like, which are mounted on or can be connected to various computer equipment for consumer or industrial use, for example. 

1-25. (canceled)
 26. An information record medium comprising: a plurality of content informations; a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations.
 27. The information record medium according to claim 26, wherein the title information includes at least one title element, and the title element includes a first pointer information to designate at least one play list set corresponding to the content informations to be reproduced.
 28. The information record medium according to claim 27, wherein the title element includes, in addition to the first pointer information, at least one of (i) a first pre-command information to indicate a command to be executed before a reproduction of the content information whose reproduction sequence is defined by one play list set designated by the first pointer information, (ii) a first post command information to indicate a command to be executed after a reproduction of the content information whose reproduction sequence is defined by said one play list set and (iii) a first next information to designate a title element to be reproduced after the presently reproduced title element.
 29. The information record medium according to claim 28, wherein one play list information defining the reproduction sequence of the content information to be reproduced is selected by the first pre-command information, from among the plurality of play list informations included in a same play list.
 30. The information record medium according to claim 26, further comprising first pre-command information for selecting one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in a same play list.
 31. The information record medium according to claim 27, wherein attribute information indicating an inherent attribute is added to each of the plurality of play list informations included in a same play list set, and the title element further includes a selectable flag indicating that one of the plurality of play list informations included in the same play list is selectable depending on the attribute information.
 32. The information record medium according to claim 27, wherein the title element further includes selection condition information indicating a selection condition about each of the plurality of play list informations included in a same play list set.
 33. The information record medium according to claim 29, wherein any one of the plurality of play list informations included in the same play list set defines the reproduction sequence of content information capable of composing a same title.
 34. The information record medium according to claim 26, wherein each play list information includes at least one play list element, the play list element includes a second pointer information to designate item information, which is logically accessible reproduction unit and composes the content information.
 35. The information record medium according to claim 34, whereinthe play list element includes, in addition to the second pointer information, at least one of (i) a second pre-command information to indicate a command to be executed before a reproduction of one item information designated by the second pointer information, (ii) a second post command information to indicate a command to be executed after the reproduction of said one item information, and (iii) a second next information to designate a play list element to be reproduced after the presently reproduced play list element.
 36. The information record medium according to claim 26, wherein each of the plurality of play list sets includes, in addition to the plurality of play list informations, an item definition table to define item information, the item information being a logically accessible reproduction unit and composing the content informations, and each of the plurality of play list informations defines the reproduction sequence of the content informations by a unit of the item information.
 37. The information record medium according to claim 34, wherein the item information comprises information, which defines a reproduction start address of the content information as in-point information and defines reproduction end address of the content information as out-point information.
 38. The information record medium according to claim 26, wherein a whole stream including a plurality of partial streams made of the plurality of content informations is multiplexed by a packet unit which is a physically accessible unit and stores pieces of the plurality of content informations, and relationship definition information defining a relationship between packets to be multiplexed and the plurality of partial streams is further recorded, as reproduction control information to control a reproduction of the plurality of content informations.
 39. An information record apparatus comprising: a first record device for recording a plurality of content informations; a second record device for recording a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and a third record device for recording title information designating at least one play list set, which corresponds to the content information to be reproduced, from among the plurality of play list sets to reproduce the content information as a title, the title being a logical information unit of the content information.
 40. An information record method comprising: a first record process of recording a plurality of content informations; a second record process of recording a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and a third record process of recording title information designating at least one play list set, which corresponds to the content information to be reproduced, from among the plurality of play list sets to reproduce the content information as a title, the title being a logical information unit of the content information.
 41. An information reproduction apparatus for reproducing the information record medium according to claim 26, said apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the content information in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set.
 42. An information reproduction apparatus for reproducing the information record medium according to claim 29, said apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the content information in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, wherein the control device selects said one play list information from among the plurality of play list informations included in the selected play list set, on the basis of the first pre-command information.
 43. An information reproduction apparatus for reproducing the information record medium according to claim 31, said apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the content information in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, wherein the control device selects said one play list information from among the plurality of play list informations included in the selected play list set, on the basis of the attribute information, if it is indicated by the selectable flag that the play list information is selectable.
 44. An information reproduction apparatus for reproducing the information record medium according to claim 32, said apparatus comprising: a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information; and a control device for (i) selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and (ii) controlling the reproduction device to reproduce the content information in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set, wherein the control device selects said one play list information from among the plurality of play list informations included in the selected play list set, on the basis of the selection condition information.
 45. An information reproduction method of reproducing the information record medium according to claim 26, said method implemented with an information reproduction apparatus comprising a reproduction device capable of reproducing the plurality of content informations, the plurality of play list sets and the title information, said method comprising: a first control process of selecting at least one play list set designated by the title information reproduced by the reproduction device, from among the plurality of play list sets reproduced by the reproduction device and a second control process of controlling the reproduction device to reproduce the plurality of content informations in accordance with the reproduction sequence defined by one play list information defining the reproduction sequence of the content information to be reproduced, from among the plurality of play list informations included in the selected play list set.
 46. A computer program for a record control to control a computer disposed at the information record apparatus according to claim 39, said program making the computer function as at least a part of the first record device, the second record device and the third record device.
 47. A computer program for a reproduction control to control a computer disposed at the information reproduction apparatus according to claim 41, said program making the computer function as at least a part of the reproduction device and the control device.
 48. A data structure including a control signal, said structure comprising: a plurality of content informations; a plurality of play list sets each including a plurality of play list informations defining reproduction sequence of the plurality of content informations; and title information designating at least one play list set, which corresponds to the content informations to be reproduced, from among the plurality of play list sets to reproduce the plurality of content informations as a title, the title being a logical information unit of the plurality of content informations. 